Investigators are looking into whether Tamerlan Tsarnaev, who spent six months in Russia’s Caucasus in 2012, was influenced by the religious extremists who have waged an insurgency against Russian security services in the area for years. The brothers have roots in Dagestan and neighboring Chechnya, but neither spent much time in either place before the family moved to the United States a decade ago.
On Wednesday, their mother, Zubeidat Tsarnaeva, was inside the FSB building in Makhachkala, the capital of Dagestan, where she was believed to be speaking further to U.S. and Russian investigators.
Heda Saratova, a prominent Chechen rights activist providing support to the distraught mother, said Tsarnaeva first went in for questioning on Tuesday, returning late at night. Saratova said she had no details about the discussions, but Tsarnaeva said they were “cordial.”
The father, Anzor Tsarnaev, also was summoned to the FSB headquarters but did not go because he felt ill.