Boston Marathon bombing

=== International reactions ===
[[File:US flag flying at half mast in Milan, 2013.JPG|thumb|upright=0.75|Flag flying at half staff at the American consulate in [[Milan]], Italy]]

The bombing was denounced and condolences were offered by many international leaders as well as leading figures from international sport. Security measures were increased worldwide in the wake of the attack.<ref name="oregon" /><ref name="AutoLC-144" /><ref name="telegraph_wl" /><ref name="SI_1" />

In China, users posted condolence messages on [[Sina Weibo|Weibo]] in response to the death of Lü Lingzi.<ref name="newyorkFan" /><ref>{{Cite web|first=Kevin|last=Tang|date=April 17, 2013|title=After Massive Online Search For Lu Lingzi, Chinese Netizens Express Grief|url=https://www.buzzfeednews.com/article/kevintang/after-massive-online-search-for-lu-lingzi-chinese-netizens-e|url-status=live|archive-url=https://web.archive.org/web/20210615024039/https://www.buzzfeednews.com/article/kevintang/after-massive-online-search-for-lu-lingzi-chinese-netizens-e|archive-date=June 15, 2021|website=[[BuzzFeed News]]|language=en}}</ref> Chris Buckley of ''The New York Times'' said "Ms. Lu's death gave a melancholy face to the attraction that America and its colleges exert over many young Chinese."<ref name="Buckley" /> Laurie Burkitt of ''[[The Wall Street Journal]]'' said "Ms. Lu's death resonates with many in China" due to the [[one-child policy]].<ref name="AutoLC-146" />

Organizers of the [[2013 London Marathon|London Marathon]], which was held six days after the Boston bombing, reviewed security arrangements for their event. Hundreds of extra police officers were drafted in to provide a greater presence on the streets, and a record 700,000 spectators lined the streets. Runners in London observed a 30-second silence in respect for the victims of Boston shortly before the race began, and many runners wore black ribbons on their vests. Organizers also pledged to donate US$3 to a fund for Boston Marathon victims for every person who finished the race.<ref name="Katz" /><ref name="AutoLC-147" /><ref name="AutoLC-148" />

Organizers of the 2013 [[Vancouver Sun Run]], which was held on April 21, 2013, donated $10 from every late entry for the race to help victims of the bombing at the Boston Marathon. Jamie Pitblado, vice-president of promotions for The Vancouver Sun and The Province, said the money would go to One Fund Boston, an official charity that collected donations for the victims and their families. Sun Run organizers raised anywhere from $25,000 to $40,000. There were over 48,000 participants, many dressed in blue and yellow (Boston colors) with others wearing Boston Red Sox caps.<ref name="Auto9P-8" />

[[Petr Gandalovic]], ambassador of the Czech Republic, released a statement after noticing much confusion on Facebook and Twitter between his nation and the Chechen Republic. "The Czech Republic and Chechnya are two very different entities – the Czech Republic is a Central European country; Chechnya is a part of the Russian Federation."<ref name="AutoLC-152" />

Security was also stepped up in Singapore in response to online threats made on attacking several locations in the city-state and the Singapore Marathon in December. Two suspects were investigated and one was eventually arrested for making false bomb threats.<ref>{{cite web |url= http://www.thejakartaglobe.com/international/singapore-hit-by-bomb-hoaxes-after-boston-attacks/ |title= Singapore Hit By Bomb Hoaxes After Boston Attacks |access-date= April 11, 2015 |archive-url= https://web.archive.org/web/20140305220307/http://www.thejakartaglobe.com/international/singapore-hit-by-bomb-hoaxes-after-boston-attacks/ |archive-date= March 5, 2014 |url-status= dead }}</ref>

[[File:Copley-sq-memorial-visit 5540515857 o.jpg|thumb|[[United Kingdom]] Prime Minister [[David Cameron]] (left) joins Massachusetts Governor Deval Patrick in paying respects at Copley Square on May 14]]
[[David Cameron]] (prime minister of the [[United Kingdom]]) posted on [[Twitter]], "The scenes from Boston are shocking and horrific - my thoughts are with all those who have been affected."<ref>{{cite web |last1=Rebecca |first1=Ruehlman |title=Our Marathon |url=https://marathon.library.northeastern.edu/item/neu:m042rp075/ |website=marathon.library.northeastern.edu/ |publisher=Northeastern University |access-date=15 April 2024 |date=2013}}</ref> On May 14, he visited Boston as part of  a three-day visit to the United States. In Boston, he met with Governor Patrick at the [[Massachusetts State House]], offering condolences and holding a discussion with Patrick about what lessons governments could learn from the bombings. Afterwards, he and Patrick visited the temporary memorials at Copley Square, where Cameron remarked to reporters, "Everyone in the UK stands with <nowiki>[Boston]</nowiki> and <nowiki>[its]</nowiki> great people."<ref>{{cite web |title=David Cameron Visits Boston |url=https://www.wgbh.org/news/politics/2013-05-14/david-cameron-visits-boston |website=WGBH |publisher=The Associated Presss |access-date=15 April 2024 |language=en |date=14 May 2013}}</ref><ref>{{cite web |last1=Osborn |first1=Andrew |title=Britain's PM Cameron visits Boston bombing site, pays tribute |url=https://www.reuters.com/article/idUSBRE94D0RB/ |website=Reuters |access-date=15 April 2024 |date=May 14, 2013}}</ref>

==== Russian reaction ====
The [[Government of Russia|Russian government]] said that special attention would be paid to security at upcoming international sports events in Russia, including the [[2014 Winter Olympics]].<ref name="AutoLC-149" /> According to the Russian embassy in the U.S., President [[Vladimir Putin]] condemned the bombing as a "barbaric crime" and "stressed that the Russian Federation will be ready, if necessary, to assist in the U.S. authorities' investigation".<ref name="AutoLC-150" /> He urged closer cooperation of security services with Western partners<ref name="AutoLC-151" /> but other Russian authorities and mass media blamed the U.S. authorities for negligence as they warned the U.S. of the Tsarnaevs.<ref name="Russia-could">{{cite web|url=http://www.rg.ru/2013/04/26/mnenie-site.html |script-title = ru:Россия могла предотвратить теракт в Бостоне |trans-title=Russia could have prevented a terrorist attack in Boston|author=Shestakov, Yevgeny|work=Rossiyskaya Gazeta|date=April 26, 2013|access-date= April 11, 2015|language=ru}}</ref> Moreover Russian authorities and mass media since the spring of 2014 blame the United States for politically motivated false information about the lack of response from Russian authorities after subsequent U.S. requests.{{citation needed|date=February 2017}} As proof a letter from the Russian FSB was shown to the members of an official U.S. Congressional delegation to Moscow during their visit. This letter with information about Tsarnaev (including his biography details, connections and phone number) had been sent from the FSB to the FBI and CIA during March 2011.<ref name="Russia-blame-again">{{cite web|url=http://ria.ru/boston_terror/20140410/1003329322.html |script-title = ru:Эксперт: обвинения США по делу Царнаева политически мотивированы|trans-title=Expert: U.S. blame around Tsarnaev case are politically motivated|author=Korotchenko, Igor|work=RIA Novosti |date=April 10, 2014|access-date= April 11, 2015|language=ru}}</ref>

Republican U.S. Senators [[Saxby Chambliss]] and [[Richard Burr]] reported that Russian authorities had separately asked both the FBI (at least twice: during March and November 2011) and the CIA (September 2011) to look carefully into Tamerlan Tsarnaev and provide more information about him back to Russia.<ref name="BG-RUS">{{cite web|url= https://www.bostonglobe.com/news/nation/2013/04/23/russia-contacted-fbi-multiple-times-concerns-about-alleged-boston-marathon-bomber/ND0bhUdq1Tp1mRuC8xlb8N/story.html|title= Russia contacted US government 'multiple' times|author1= Bender, Bryan|author2= Bierman, Noah|work= The Boston Globe|date= April 23, 2013|access-date= March 27, 2017|archive-url= https://web.archive.org/web/20170613234646/http://www.bostonglobe.com/news/nation/2013/04/23/russia-contacted-fbi-multiple-times-concerns-about-alleged-boston-marathon-bomber/ND0bhUdq1Tp1mRuC8xlb8N/story.html|archive-date= June 13, 2017|url-status= dead}}</ref> FSB secretly recorded phone conversations between Tamerlan Tsarnaev and his mother (they vaguely and indirectly discussed jihad) and sent these to the FBI as evidence of possible extremist links within the family.{{citation needed|date=July 2020}} However, while Russia offered US intelligence services warnings that Tsarnaev planned to link up with extremist groups abroad, an FBI investigation yielded no evidence to support those claims at the time. In addition, subsequent U.S. requests for additional information about Tsarnaev went unanswered by the Russians.<ref>{{cite news|last=Radia|first=Kirit|title=Lawmakers Traveling to Russia to Investigate Boston Bombing|url=https://abcnews.go.com/blogs/headlines/2013/05/lawmakers-traveling-to-russia-to-investigate-boston-bombing/|newspaper=ABC News|date=May 21, 2013 |access-date= April 11, 2015}}</ref>{{Failed verification|date=April 2023|reason=No mention in reference of unanswered requests.}}

==== Chechen reactions ====
On April 19, 2013, the press secretary of the [[head of the Chechen Republic]], [[Ramzan Kadyrov]], issued a statement that, inter alia, read: "The Boston bombing suspects have nothing to do with Chechnya".<ref name="AutoLC-153" /><ref name="AutoLC-154" /> On the same day, Kadyrov was reported by ''[[The Guardian]]'' to have written on [[Instagram]]:<ref name="AutoLC-155" />

{{blockquote|Any attempt to make a link between Chechnya and the Tsarnaevs, if they are guilty, is in vain. They grew up in the U.S., their views and beliefs were formed there. The roots of evil must be searched for in America. The whole world must battle with terrorism. We know this better than anyone. We wish recover {{sic}} to all the victims and share Americans' feeling of sorrow.}}

[[Akhmed Zakayev]], head of the secular wing of the [[Chechen Republic of Ichkeria|Chechen separatist movement]], now in exile in London, condemned the bombing as "terrorist" and expressed condolences to the families of the victims. Zakayev denied that the bombers were in any way representative of the Chechen people, saying that "the Chechen people never had and can not have any hostile feelings toward the United States and its citizens".<ref name="AutoLC-156" />

The [[Caucasus Emirate|Mujahideen of the Caucasus Emirate Province of Dagestan]], the [[North Caucasian Federal District|Caucasian]] Islamist organization in both Chechnya and Dagestan, denied any link to the bombing or the Tsarnaev brothers and stated that it was at war with Russia, not the United States. It also said that it had sworn off violence against civilians since 2012.<ref name="AutoLC-157" /><ref name="AutoLC-158" /><ref name="AutoLC-159" />