At least 14 people were killed and 28 wounded when an explosion ripped through a trolley bus in the Russian city of Volgograd on Monday, the country's third deadly attack in four days.
The explosion, which authorities blamed on a suicide bomber, tore out much of the electric bus' exterior, left mangled bodies on the street and raised fears about more violence in the lead-up to the Sochi Winter Olympics that Russia will host in six weeks.
NBC's Jim Maceda reports on the trolley bus explosion in Volgograd, Russia – a third explosion in the country in the last few days – as the Sochi Olympics near.
"For the second day, we are dying -- it's a nightmare," a woman near the scene told Reuters, her voice trembling. "What are we supposed to do, just walk now?"
Volgograd, a city of around one million about 400 miles northeast of Sochi, is a key transport hub for southern Russia, with many bus routes linking it to the volatile provinces in the North Caucasus.
On Sunday, 17 people were killed in a terror attack by a suspected female suicide bomber at a railway station in Volgograd. And on Friday, a car bomb killed three people in the southern Russian city of Pyatigorsk, 170 miles east of Sochi, where the Olympics will be held.
In October, another female suicide bomber was blamed for a bus explosion in Volgograd that killed five people.
The blasts on Sunday and Monday were probably connected because the TNT and shrapnel-packed bombs were "identical," said Vladimir Markin, spokesman for Russia's main investigative agency.