Syria 'inching towards civil war' says BBC's Simpson

Syria's main opposition coalition has called for emergency meetings of the UN Security Council and the Arab League to discuss the intensifying violence in the north-west of the country.

The Syrian National Council, which is based outside Syria, says about 250 people have been killed since Monday.

A human rights group has accused the Syrian authorities of carrying out an "organised massacre" in Idlib province.

John Simpson's report contains some disturbing images.