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Volgograd bus blast: Southern Russia explosion kills six Volgograd bus bomb blast kills five
(35 minutes later)
An explosion has ripped through a bus in the southern Russian city of Volgograd, killing at least six people and injuring seven. An explosion that killed at least five people on a bus in the southern Russian city of Volgograd was caused by a bomb, Russia's National Anti-Terrorism Committee has said in a statement.
The cause of the blast, which happened just after 14:00 local time (10:00 GMT), remains unclear. The blast, which happened just after 14:00 local time (10:00 GMT), injured more than a dozen people.
Cities further south, in Russia's North Caucasus, have seen attacks by Islamist militants in recent years; the blast on Monday may be linked. Cities further south, in Russia's North Caucasus, have seen attacks by Islamist militants in recent years.
But it may have been caused by a technical malfunction, reports suggest. There may be fears of a link with the Volgograd blast, correspondents say.
It is believed there were 40 people on board the bus, the BBC's Steve Rosenberg in Moscow reports.
Explosives experts are currently on the scene sifting through the wreckage, our correspondent adds.
So far, there has been no information about who might have carried out the bombing, he says.