This according to the leader of the mainly Muslim region in southern Russia on Friday.
"We do not know the Tsarnaevs. They did not live in Chechnya. They lived and studied in America. What happened in America is the fault of the American special services," the strongman leader of the North Caucasus region told the RIA Novosti news agency.
"It has become typical to link everything that happens in the world to Chechens, to blame the Chechens, even for the tsunami," said the leader, known for his outspoken remarks.
"But the accusation is not yet proof that these people are to blame for what happened. In any case they were brought up in America and this is their upbringing."
The Russian-language social networking page of the younger brother Dzhokhar Tsarnaev (19) records that he speaks the Chechen language and joined two groups for Chechens.
Tamerlan Tsarnaev (26) who was shot and killed by police in Boston, featured links on his YouTube site to people he identified as "terrorists", but did not mention his Chechen origins.
Russia condemns all "terrorists" regardless of their nationality, President Vladimir Putin's spokesperson said on Friday.
"They all deserve to be rejected," spokesperson Dmitry Peskov said in the southern Russian city of Sochi, adding that the Russian authorities were waiting for official information from the United States on the dead man and a suspected accomplice. – AFP, Reuters