A bomb blast ripped a trolleybus apart in Volgograd today, killing at least 10 people in the second deadly attack in the southern city in two days and raising fears of further violence as Russia prepares to host the Winter Olympics.
The morning rush-hour bombing, which left mangled bodies in the street, underscored Russia's vulnerability to militant attacks less than six weeks before the Sochi 2014 Games, a prestige project for President Vladimir Putin.
It came less than 24 hours after a suicide bomb blast killed at least 17 people in the main railway station in the same city, a major transport hub in southern Russia.
A Reuters journalist saw the blue-and-white trolleybus reduced to a twisted, gutted carcass, its roof blown off and bodies and debris strewn across the street.
Federal investigators called the blast a "terrorist act".
"For the second day, we are dying - it's a nightmare," a woman near the scene said, her voice trembling as she choked back tears.
"What are we supposed to do, just walk now?"
The consecutive attacks will raise fears of a concerted campaign of violence before the Olympics, which start on February 7 in Sochi, about 690km southwest of Volgograd.
In a video posted on the web in July, the leader of insurgents who want to carve an Islamic state out of the North Caucasus, a string of Muslim provinces south of Volgograd, urged militants to use "maximum force" to prevent the games from being held.