BEIRUT (AP) — Local authorities outside the Syrian capital say government forces have cut off their town from a surrounding rebel-held enclave, isolating 20,000 residents with no access to aid.

A member of the local council of Harasta said Wednesday that residents have been in underground shelters for long periods amid heavy bombardment. He said government forces have seized local cemeteries, forcing residents to bury their dead elsewhere.

He spoke on condition of anonymity out of safety concerns.

Harasta is in eastern Ghouta, a rebel-held region that has been under a crippling siege and daily bombardment for weeks. Opposition activists say more than 1,100 civilians have been killed since the latest offensive began in February.

Government forces have recently split the enclave in two and cut off the towns of Douma and Harasta.