MOSCOW, Feb. 6 (UPI) -- A bomb blast on a crowded Moscow subway train killed at least 30 people and injured more than 100 others Friday morning, Russian news agencies reported.
A major fire followed the explosion, which brought nearly 50 ambulances and a med-evac helicopter to the scene during the city's morning rush hour.
Deputy Mayor Valery Shantsev told a news conference the cause was quite clear.
"There is no doubt that it was a terrorist attack," he said. "The explosion was caused by a device that lay on the floor of the carriage in a bag or a parcel."
The city's fire department set out a number of high-powered fans to exhaust the smoke from the tunnel. Many of the injured rushed to hospitals suffered from respiratory tract burns.
Russian President Vladimir Putin condemned the blast, saying, "Terrorism is the plague of the 21st century."