Published: Jan 24, 2011 6:13 PM EST
Updated: Jan 24, 2011 3:13 PM EST

MOSCOW (AP) - Russia's president says a deadly bombing at Moscow's busiest airport today looks like "a terror attack."

The explosion tore through the international arrivals hall at Domodedovo (DOH'-muh-DYED'-uh-vuh) Airport, killing more than 30 people and wounding about 130.

Russia's state news agency cites law enforcement sources saying the blast may have been caused by a suicide bomber.

President Dmitry Medvedev has ordered authorities to boost security at Moscow's two other commercial airports, the city's subway system and other transportation facilities. In a televised briefing, Medvedev told officials that security regulations had been breached and preliminary indications are that terrorists were responsible.

Amateur video posted on YouTube shows the terminal engulfed by smoke, with a pile of bodies in one section. Other bodies and luggage were scattered around the floor, and several small fires were burning.