|Photo provided by the Russian Emergencies Ministry on Oct. 21, 2013 shows the damaged bus by blast in Volgograd, Russia. At least six people were killed when a bus was hit by an explosion on Monday in southern Russia, the Investigative Committee said.
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MOSCOW, Oct. 21 (Xinhua) -- At least six people were killed when a bus was hit by an explosion on Monday in southern Russia, the Investigative Committee said.
The explosion in the city of Volgograd was reported at around 2 p.m. Moscow time (1005 GMT). "Six bodies have now been found," the committee's press service told reporters.
A criminal case, murder to be specific, has been opened, it said, adding "the qualification of the case may be changed during the investigation."
Twenty people got injured in the explosion, seven of whom were in critical condition, the Interior Ministry's main department for Volgograd region said.
Local media reported earlier that four people were killed and seven others injured.
The cause of the incident is yet to be determined as "it is too early to assert that flawed gas equipment might have triggered the explosion," the Interfax news agency quoted an unnamed local police source as saying.