Female suicide bomber kills 16 at Russian railway station (2)

President Vladimir Putin instructed the government to take all measures to assist those wounded in the explosion, said his spokesperson Dmitry Peskov.

The president ordered the Investigative Committee to fulfill required investigative actions and law enforcement agencies to ensure security.

Prime Minister Dmitry Medvedev also urged his government to offer necessary assistance to the victims, said the press service of the government.

The Interior Ministry said that security has been tightened at railway stations and airports after the fatal blast.

The incident was the second of its kind that had rocked Volgograd recently. Two months ago, a female suicide attacker blew herself up on a bus, killing seven and injuring dozens of others.

The October attacker was later identified as the wife of Dmitry Sokolov, a man from the Moscow suburbs who joined an insurgent group in southern Russia's Dagestan Republic.

In September, Putin warned that the situation in the North Caucasus remained a challenge for state security. He called on all law enforcement departments to be mobilized to maintain law, order and peace in the region.

According to a recently passed anti-terror bill by the Russian government, relatives of the extremists who conducted terror attacks should also take their responsibilities. They ought to compensate damage caused by the terrorists.