BBC News with Zoe Diamond

The Arab League has urged Syria to start a political dialogue with the opposition within two weeks and form a national unity government within two months. It also asked Syria to hold multiparty elections under a new constitution. The Prime Minister of Qatar, Sheikh Hamad bin Jassim al-Thani, spoke on behalf of the Arab League in Cairo.

"And we call on the Arab League to find (out) financial support for this to set up a commission to investigate the killing and also for finding compensation for the victims, and also for preparing a constituent assembly based on transparent and fair elections."