DAMASCUS, Jan. 31 (Xinhua) -- The U.S. forces and its allied Kurdish militia on Thursday prevented an aid convoy sent by the Syrian government to reach a town in eastern Syria, state news agency SANA reported.

The U.S. forces and allied Kurdish-led Syrian Democratic Forces (SDF) prevented the aid convoy to reach civilians in the town of Hajin in the eastern countryside of Deir al-Zour province, said SANA.

It noted that the convoy includes 10 truckloads of drinking water, medicine, and hygiene kits along with some necessary materials.

The SDF hindered the passing of aid in the town of Husainiyeh over pretext that the U.S. forces in the area would prevent it from reaching Hajin, said SANA.

The official agency said the measure runs counter to the international law and shows the indifference of the U.S. about the tough humanitarian situation of the civilian in Hajin, which was subject to heavy shelling by the U.S.-led coalition.

It's worth noting that Haijin was held by the Islamic State (IS) group which was defeated recently in that area.

The U.S.-led coalition struck the town several times and dozens of civilians were either killed or wounded before the SDF took control over it.

On Thursday, the Syrian Observatory for Human Rights said the IS group is besieged in an area of 4 square km in the eastern Euphrates region in eastern Deir al-Zour after losing much of its last held-pocket in that part of the country.

The UK-based watchdog group said after losing its last position in the eastern Euphrates, the group will be fought in the Syrian desert where it holds 4,000 square km.

The SDF with the help of the U.S. has been fighting IS in the eastern Euphrates since September 2018.

Earlier in the day, the Observatory said the SDF rejected an offer to allow the last IS fighters and their families to leave the eastern Euphrates toward the Syrian desert.