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When police were able to move in after the hail of bullets stopped, they found unexploded devices littering the street and one in the carjacked SUV that the brothers had been driving. The devices contained the same type of shrapnel used in the marathon bombs.
“There is no doubt that they were made by these two guys,” Davis said.
Police finally found the suspect cowering in a boat in a backyard in Watertown, hours after police went door to door searching for him after he escaped on foot. A man went to check on his boat after the tarp had come loose.
“He saw the suspect, retreated, and called police and we were there instantaneously,” Davis said.
TRIP TO RUSSIA
Tamerlan Tsarnaev traveled to Moscow in January 2012 and spent six months in the region, a law enforcement source said.
He spent at least a month last summer helping his father renovate his first-floor apartment next door to a dentistry in Makhachkala, a city in the Dagestan region on the Caspian Sea.
It was unclear if he could have had contact with militant Islamist groups in southern Russia’s restive Caucasus region.
A group leading an Islamist insurgency against Russia said on Sunday it was not at war with the United States, distancing itself from last week’s Boston bombing.
A statement from militants operating in Dagestan, where the brothers spent time as children, said the leading insurgency group Caucasus Emirate, led by Russia’s most wanted man Doku Umarov, was not attacking the United States.
“We are fighting with Russia, which is responsible not only for the occupation of the Caucasus but for monstrous crimes against Muslims,” the statement said.
The insurgency is rooted in two separatist wars that Russian troops waged against Chechen separatists following the fall of the Soviet Union.
The role of the FBI is also being questioned after the agency said it had interviewed Tamerlan in 2011 after Russian security services raised concerns he followed radical Islam. The FBI said it did not find any “terrorism activity” at that time.
The suspect’s mother, Zubeidat Tsarnaeva, who now lives in Russia, told a Russian television station Tamerlan had been under FBI surveillance for years.
The bombings prompted contact between the United States and Russia, and the Kremlin said on Saturday the presidents of both countries agreed by telephone to increase cooperation on counter-terrorism.
Ruslan Tsarni, who said he was an uncle of the brothers, told CNN on Saturday he first noticed a change in Tamerlan’s religious views in 2009. He suggested the radicalization of his nephew happened while he was in the United States “in the streets of Cambridge (Massachusetts).”
The family emigrated to the United States about a decade ago. The brothers spent their early years in a small community of Chechens in the central Asian country of Kyrgyzstan, a mainly Muslim nation of 5.5 million. The family moved in 2001 to Dagestan, a southern Russian province that lies at the heart of a violent Islamist insurgency and where their parents now live.