At least eight people were killed on Monday in twin car bombings in Russia`s North Caucasus region, officials said.
The suicide squad made up of three women and one man had spent time in Pakistan and Iran.
A bomb exploded on a railway track in Russia`s Dagestan province on Sunday, derailing a freight train days after suicide bombers killed 12 people in the region, Russian news agencies reported. Nobody was hurt.
Day in Pics: 29th January
Showbiz World - January 29, 2015
President Barack Obama's speech at Siri Fort auditorium