Double suicide bombings kill 37 on Moscow subway
The head of Russia's main security agency says Caucasus rebels are believed to have carried out two sucide bombings on Moscow's subway system that killed 36 people.
Officials say two female suicide bombers blew themselves up on trains as the subway was packed with rush-hour passengers Monday morning.
In a televised meeting with President Dmitry Medvedev, the head of the Federal Security Service said preliminary investigation points to terrorists connected to the restive Caucasus region that includes Chechnya.
Alexander Bortnikov said the assessment was based on fragments of the bombers' bodies. He did not elaborate.
President Barack Obama has condemned the rush hour bombings in the Moscow metro, offering his condolences to the Russian people.
In a statement issued by the White House early Monday, the president said the American people stand united with the people of Russia in opposition to violent extremism and "heinous" terrorist attacks.
New York City officials say they have increased security on subways throughout the city.
NJ Transit officials say they are not increasing security on trains and buses.
AP wires contributed to this report.