Detectives in Boston are looking further afield as they piece together their case against Marathon suspect Dzohkhar Tsarnaev.
The uncle of Boston bombing suspect Tamerlan Tsarnaev described his recent visit to Dagestan in Russia and his great shock at the attacks.
Both men were enrolled in a school in Dagestan, a neighbouring region that was drawn into Chechnya's violence during the 1990s.
A woman who admitted tweeting the identity of the alleged victim in the trial of Coronation Street's Michael Le Vell has been fined £110 today.
Mr Le Vell was acquitted of all charges but at the end of the trial, Deborah Armstrong, 37, wrote on her Twitter account: "I hope Michael Le Vell's victim ... now goes public" - and identified the female involved.
The tweet, sent using the handle @DebbieJ1976, was re-tweeted and when pointed out to her that her tweet was breaking the law she told others: "You are not my judge and jury."
Armstrong, of St Gregory's Close, Bedale, North Yorkshire, was fined after pleading guilty to an offence under the Sexual Offences Amendment Act on September 10 last year, of publishing information that could lead to members of the public identifying a complainant in a sexual offences case.
Passing sentence, District Judge Khalid Qureshi said: "It's not like the old days where it's a quiet chat in the pub, this becomes public within minutes."
The law gives lifelong anonymity to anyone if they are the complainant in a sex offence case and nothing must be published that can identify them.
The apparent successor to Chechen militant Doku Umarov, who was reported dead today, has issued a video message assuming the leadership of the Caucasus Emirate group.
The YouTube video was posted on the same website which earlier reported Umarov's death.
Speaking in a mixture of Arabic and Russian, Ali Abu Muhammed said "our brother" Umarov had passed away and that he was now taking on his position.
- One of Russia's most-wanted terrorists, head of the Caucasus Emirate militant group and nicknamed 'Russia's Bin Laden'.
- Recently reported to have urged militants to attack the Winter Olympics in Sochi.
- The US State Department offered a bounty of $5m for information leading to his capture.
- claimed responsibility for numerous attacks in Russia, including the 2010 Moscow Metro bombings and the Domodedovo airport bombing in 2011.
- Chechnya's pro-Russian president, Ramzan Kadyrov, claimed Umarov had been killed in January.
One of Russia's most wanted men, the Chechen rebel leader Doku Umarov, has reportedly died.
The Kavkaz Center, a website linked to Islamist militants, claimed Umarov had "become a martyr", although there were no details on how he may have died.
A spokesman for Russia's anti-terrorism agency was unable to confirm whether the claims were true.
A jihadist website linked to an Islamist movement founded by a leading Chechan militant said there were no links between the group and the Boston bombings. In a statement, the group said their target was Russia, not America, and that they do not "strike on civilian targets".
The Command of the Province of Dagestan indicates [...] the Caucasian Mujahideen are not fighting against the United States of America. We are at war with Russia. [...]
Also, remember that even in respect to the enemy state of Russia, [...] there is an order by the Emir Dokku Umarov which prohibits strikes on civilian targets.
In this regard, the Command of the Mujahideen of the Province of Dagestan urges the media, primarily the American, to halt speculations and promotion of Russia propaganda.
Residents in the Northern Caucasus state of Dagestan have said they are surprised by the "huge reaction" the attacks in Boston have received across the world.
Dagestan is a focal point of insurgency in the region, where militants wage almost daily violence to establish an Islamist state.
Caucasian Knot, a website dedicated monitoring the violence, says 124 people have been killed and 75 wounded in the first three months of this year across predominantly Muslim Russian provinces, stretching from the Caspian to the Black Sea, including Dagestan and Chechnya.
A young Dagestan resident told Reuters:
Such things are always upsetting but you know this happens every day here. We're surprised by the huge reaction.
Americans think they are some kind of 'super people', like their lives are more important than others.
Tamerlan Tsarnaev kept a low profile during his visit to his family in Dagestan last summer, according to neighbours.
Tamerlan helped his father renovate his apartment next to a dentist is Makhachkala, speaking Russian with an American accent. Madina Abdulayeva described the 26-year-old:
"He was calm, intelligent, handsome, so fashionable. If you were to see him, you'd fall in love with him straight away.
"They say he was a fanatic. I didn't see that. We're all Muslim here. We're all part of Islam. We all pray."
The FBI has confirmed it investigated whether at least one of the Boston Marathon bomb suspects was a follower of "radical Islam" including interviews with Tamerlan Tsarnaev and family members.
In a statement, the FBI said a "foreign government" asked the FBI for information on Tamerlan Tsarnaev.
This request was based on information he had "changed drastically since 2010 as he prepared to leave the United States for travel to the country’s region to join unspecified underground groups".
Both suspects were born in Kyrgyzstan.
The request stated that it was based on information that he was a follower of radical Islam and a strong believer, and that he had changed drastically since 2010 as he prepared to leave the United States for travel to the country’s region to join unspecified underground groups.
The FBI checked... for such things as derogatory telephone communications, possible use of online sites associated with the promotion of radical activity, associations with other persons of interest, travel history and plans, and education history. The FBI also interviewed Tamerlan Tsarnaev and family members.
The FBI said it had not found any terrorism activity, domestic or foreign, and those results were provided to the foreign government in the summer of 2011.
It said the FBI requested but "did not receive more specific or additional information from the foreign government".