Death toll from two terrorist attacks increases

VOLGOGRAD -- The death toll from two terrorist attacks carried out in Volgograd in less than 24 hours rose to 33 after one person died in the hospital overnight.

(Beta/AP)
(Beta/AP)

"A victim of the explosion at the railway station on Sunday has died in the hospital in Volgograd and the number of victims (of that attack) has risen to 18," said spokesman for the Ministry of Emergency Situations Dmitri Ulyanov, AFP reported.

A terrorist who detonated a second device on Monday in a trolleybus killed 15 people.

Five days of mourning have been declared in this region of Russia, while President Vladimir Putin instructed the relevant departments to raise security measures across the country, especially in Volgograd, to a higher level.

A few hours after the second attack in Volgograd, an improvised device exploded in the town of Khasavyurt in Russia's Dagestan Republic, killing a passer-by and injuring two policemen.

The attacks raise fears about security ahead of the opening of the Winter Olympic Games in Sochi.

The authorities have not directly accused of any group for the attacks in Volgograd, but a statement of the Russian Foreign Ministry said that the attacks followed the threat of extremists such as Doku Umarov, the leader of Islamic extremists from north Caucasus.

Umarov has "called on his fighters" to prevent the holding of the Olympics, said reports.