2nd Deadly Blast Hits Volgograd in Just 2 Days
At least 14 people have been killed and 40 others hurt in a suspected terrorist attack on a trolleybus in the Russian city of Volgograd, officials say.
The blast comes a day after 17 people died in a suicide bombing at the central station in the city.
Security has been tightened at railway stations and airports across Russia.
Sunday's blast rocked Volgograd-1 station at around 12:45 (08:45 GMT) at a time of year when millions of Russians are travelling to celebrate the New Year.
A nearby security camera facing the station caught the moment of the blast, showing a bright orange flash behind the station's main doors.
The explosion shattered windows and sent debris and plumes of smoke from the station entrance.
In October, a bomber blew up a passenger bus in Volgograd, killing six people and wounding more than 30 others.
Russian media reported that a female Islamist suicide bomber from the Russian region of Dagestan was responsible for that attack.