Russian Prime Minister Vladimir Putin today vowed to "destroy" the terrorists, who were behind the blasts at two metro stations in Moscow, and is rushing to the capital after cutting short his visit to Siberia.<br/>He described the blasts a crime with horrible consequences and heinous in nature committed against peaceful citizens in Moscow.<br/>Putin said in a televised statement during a meeting with his key cabinet colleagues through video conference.the law enforcement agencies will do everything to trace and punish the criminals and the terrorists will be destroyed.<br/>Earlier at his Kremlin meeting with security chiefs, President Dmitry Medvedev declared that the line to suppress terror and combat terrorism will continue.<br/>Meanwhile, a day of mourning has been declared tomorrow in Moscow to express solidarity with the victims of the terror strike.<br/>Two suicide bombers targetted Moscow's busy subway system during the Monday morning rush hour today killing at least 40 people and injuring over 30 others in twin blasts. The blast took place at 7.56 am local time at Lubyanka station killing 14 passengers and 11 people waiting on the platform, besides injuring 18 persons.The incidents occurred near the Kremlin and the Federal Security Service headquarters.<br/><br/>The second blast took place at the Park Kultury station near the Gorky Park killing at least 15 people and injuring another 12 passengers. Though no organisation has claimed responsibility for carrying out the attacks, Moscow's chief prosecutor said the bombings were caused by suicide bombers wearing belts packed with explosives.<br/><br/>The rescuers have pressed helicopters into service to evacuate the injured to hospitals. Special buses have been pressed in to take stranded passengers to their destination. The last time Moscow was hit by a terror attack was in August 2004, when a suicide bomber blew her up outside a city subway station, killing 10 people.<br/><br/><br/>Meanwhile, India today said that it stands united with Russia in combating the forces of violence and terrorism. Describing the twin blasts in Moscow as most horrific act of violence the Prime Minister Dr Manmohan Singh in a letter to President Medvedev expressed India's solidarity with Russia. In a statement the Ministry of External Affairs expressed the hope that the perpetrators of these senseless attacks will be brought to justice. India also reiterated its conviction that only collective efforts by the international community can combat the scourge of terrorism that the world is facing today.<br/>