MOSCOW (Update) - A suicide bomber killed around 35 people at Russia's biggest airport, Moscow-Domodedovo, on Monday in an attack that bore the hallmarks of militants fighting for an Islamist state in the north Caucasus region. President Dmitry Medvedev vowed to track down and punish those behind the bombing, which also injured about 130 people during the busy late afternoon. "The explosion was right near me, I was not hit but I felt the shock wave - people were falling," said Yekaterina Alexandrova, a translator who was waiting in the crowded arrivals area to meet a client flying in from abroad. "Smoke started to gather - there was a lot of smoke," she said by telephone. "Many of the injured went outside on their own in a state of shock. Then they began to announce information about where to exit." The Kremlin said Medvedev, who has called the insurgency in the north Caucasus the biggest threat to Russia's security, was delaying a trip to the Davos international business forum in Switzerland. The rebels have vowed to take the bombing campaign to the Russian heartland, hitting transport and economic targets. "Security will be strengthened at large transport hubs," Medvedev wrote on Twitter. "We mourn the victims of the terrorist attack at Domodedovo airport. The organizers will be tracked down and punished." Russia's ruble-denominated stock market MICEX fell by nearly two percent following the blast, which ripped through the arrivals hall.
