Syria crisis: UN humanitarian chief Valerie Amos arrives in Damascus

The UN's humanitarian chief has arrived in Syria to urge the government to allow aid access to its battle-scarred cities.

Valerie Amos met the Syrian foreign minister in Damascus and is to visit the violence-hit city of Homs.

Syria has said it will not allow an International Committee of the Red Cross (ICRC) aid convoy into Homs because of security concerns.

The BBC's Jim Muir reports from Lebanon.