DAMASCUS, March 9 (Xinhua) -- A total of 13 truckloads of aid started entering the rebel-held Douma district in the capital Damascus' Eastern Ghouta countryside Friday, Red Cross spokesperson told Xinhua.

The 13 truckloads are part of the 46 trucks that entered Douma a few days before but couldn't be unloaded at the time due to the situation on ground, Inji Sedky, the spokesperson of the International Committee of the Red Cross (ICRC) said.

Activists said the 13 truckloads had to leave Douma due to government shelling, while the government says the rebels shelling hindered the full offload of the remaining trucks before they prepared again to enter Douma on Friday.

Meanwhile, Sedky said the 13 trucks included 2,400 food parcels and 3,240 wheat flour bags.

The UN humanitarian agencies have sounded the alarm about the worsening humanitarian situation in that region, where activists said over 800 people have been killed since late last month by the heavy bombardment and military showdown in areas of Eastern Ghouta.

The Syrian army has captured 52 percent of Eastern Ghouta in recent days, as part of an ongoing wide-scale offensive to dislodge the rebels from that key area on the eastern rim of Damascus.