MOSCOW (AP) -- Russian investigators say a suicide bomber most likely carried out the attack that killed at least 31 people and wounded over 140 at Moscow's busiest airport.

Investigative Committee spokesman Vladimir Markin says experts are now trying to identify the suspected bomber.

The explosion ripped through the international arrivals hall at Domodedovo Airport on Monday afternoon.

------------------------

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 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.

--------------------------

MOSCOW (AP) -- Russian authorities say 31 people are dead and about 130 wounded after an explosion ripped through the arrivals hall at Moscow's busiest airport.

The state news agency, RIA Novosti, says the explosion at Domodedovo airport may have been caused by a suicide bomber.

The airport is generally regarded as Moscow's most up-to-date, but its security procedures have been called into question.

In 2004, two suicide bombers were able to board planes at the airport by buying tickets illegally from airport personnel. The bombers blew themselves up in midair, killing all 90 people aboard the two flights.

Last March, 39 people were killed and more than 60 wounded in a pair of suicide bombings in Moscow's subway.

And in December 2009, Chechen rebels claimed responsibility for blowing up a high-speed train between Moscow and St. Petersburg.

That attack that killed 26 people and injured scores.