14 people have been killed suicide attack in Russia
suicide attack in Russia
suicide attack hits Russia's Volgograd
At least 14 people have been killed and 20 wounded in a suicide bomb attack on a packed trolleybus in Russia's Volgograd city, according to the Interfax news agency.
Volgograd was on high alert on Monday following the latest attack, that came a day after a suicide bombing at a train station in the city killed 17 people.
"An explosion in Volgograd trolleybus is likely to be a terror attack, judging from the two previous attacks on a bus and a train station," said an official from the security services who was not named by Interface.
The National Anti-Terrorism Committee said the trolleybus explosion at about 8:30am local time (0430GMT) was most likely caused by a bomb, but there were no further details.
Al Jazeera's Peter Sharp, reporting from Moscow, said the blast was unlikely to be a suicide attack as preliminary reports suggested the bomb was planted in the middle of the trolleybus.
However, later on Monday Russia's main investigative body suggested a male suicide bomber carried out an attack.
"It is now possible to preliminarily say that the explosive device was set off by a suicide bomber - a man whose body fragments have been collected and sent to genetic testing," the federal Investigative Committee said in a statement.