The head of the United Nations children's agency UNICEF has said the besieged Syrian enclave of Eastern Ghouta had become a "hell on earth" for children and aid was urgently needed.

"The bombing is almost unceasing and the amount of violence means that the child sees the violence, sees the death, the maiming. And now there is a lack of water and food, so disease is coming on," Henrietta Fore said.

Syria's government is two weeks into a fierce assault to retake Eastern Ghouta from rebels, saying the offensive is needed to stop insurgent shelling of neighbouring Damascus.

The military campaign has killed more than 900 civilians since it began on 18 February, according to the Syrian Observatory for Human Rights, a British-based war monitor.

The US Security Council demanded a 30-day ceasefire across all Syria on 24 February, but the Syrian government and its ally Russia say the truce does not extend to the rebel groups in Eastern Ghouta, which they describe as terrorist.

The head of the United Nations children's agency UNICEF has said the besieged Syrian enclave of Eastern Ghouta had become a "hell on earth" for children and aid was urgently needed.

"The bombing is almost unceasing and the amount of violence means that the child sees the violence, sees the death, the maiming. And now there is a lack of water and food, so disease is coming on," Henrietta Fore said.

Syria's government is two weeks into a fierce assault to retake Eastern Ghouta from rebels, saying the offensive is needed to stop insurgent shelling of neighbouring Damascus.

The military campaign has killed more than 900 civilians since it began on 18 February, according to the Syrian Observatory for Human Rights, a British-based war monitor.

The US Security Council demanded a 30-day ceasefire across all Syria on 24 February, but the Syrian government and its ally Russia say the truce does not extend to the rebel groups in Eastern Ghouta, which they describe as terrorist.