Two Russian planes carrying humanitarian relief aid landed in Damascus' international airport Monday, an official source told Xinhua anonymously.

The planes, carrying more than 78 tons of relief materials, were received by the Syrian Red Crescent and representatives from the international Red Cross, the source said.

The aid, including tents, blankets and food, will be offered to Syrian citizens to improve the humanitarian conditions in the unrest-hit country which has suffered great human and economic losses, the Russian Emergencies Ministry said earlier in the day.