A total of 116 people are still in hospital following Monday's terrorist attack on Moscow's Domodedovo International Airport, an emergencies official said on Wednesday.

A powerful blast struck the busy international terminal of Russia's biggest airport on Monday evening, killing 35 people and injuring up to 180.

The identity of the terrorist or terrorists who carried out the blast has not yet been officially confirmed, with conflicting reports suggesting the attack was carried out by a female Black Widow suicide bomber accompanied by a man, or a man on his own.

All 35 bodies of those killed in the attack have now been identified, the spokesman added.

Moscow is observing a day of mourning on Wednesday for the victims of Monday's attack.

Flags are flying at half mast across Moscow and the surrounding region and TV companies have been advised by the mayor's office to cancel all entertainment programs as a sign of respect.

MOSCOW, January 26 (RIA Novosti)