Thousands of civilians are believed to be trapped in Syria's central
city of Homs, as government forces continue their heavy bombardment of
the city, the UN said.

Both government forces and opposition fighters appeared to be digging in, preventing residents from accessing food and medicine.

UN
humanitarian officials say they are providing food to half a million
people in Syria, but not in Homs, which means many there are desperate
for food, clean water and medical help.