At least 10 people have been killed in an explosion on a packed trolleybus in Russia's Volgograd city, according to Interfax news agency.The attack came on Monday, a day after a suicide bomb attack in the same city killed at least 17 people in a train station.
"A blast happened inside a trolleybus in Volgograd, according to preliminary reports, 10 people died, 10 were wounded," said Irina Gogoleva, spokeswoman of South Regional Centre of Russia's Interior Ministry.
The blasts have raised safety concerns in the region ahead of the Winter Olympics 2014 due in February in Sochi, west of Volgograd.
Read more @: Second deadly blast in Russia's Volgograd - Europe - Al Jazeera English
Another deadly blast in Russia. Seems something bigger is going on in Russia. Defiantly gonna raise some more security concerns. Thoughts and prayers are with the Russian people.