A Chechen rebel leader has claimed that he is responsible for the double bombing in the Moscow subway system that killed 39 people on Monday, The New York Times said.
In the Islamist leader's statement he threatened more attacks to avenge the actions of Prime Minister Vladmir Putin, The Washington Post said.
Doku K. Umarov gave the statement via an Internet video that was posted hours after another double bombing in Dagestan. The Washington Post said.
Dagestan and Chechnya are both located in southern Russia, an area that has been in turmoil for years with the government, said The New York Times.