According to media reports, investigators in Russia said at least six people were killed Monday after a suspected female suicide bomber detonated an explosive device on a bus in the southern city of Volgograd.
As per the preliminary information received, the attack had been carried out by Naida Akhiyalova, a 30-year old woman from Russia's republic of Dagestan, in the North Caucasus, which has been riven by unrest since the mid-1990s.
This attack, if proved to have been carried out by a female suicide bomber, will serve as a stark reminder of the persisting dangers stemming from a decades-long insurgency in the North Caucasus.
Investigative Committee spokesman Vladimir Markin said that, according to eyewitnesses, the explosion took place "almost immediately after" the woman got on the bus.
"As of now, six dead people have been found, as well as the body of the suicide bomber" Markin said.
By evening, 28 people had been taken to hospital, including eight in serious condition, a city public health official told RIA Novosti.
Around 50 people were believed to be riding the bus at the time of the blast.