The Syrian city of Homs is under more heavy bombardment on Thursday.
Opposition groups say rockets, artillery and mortar rounds are pounding their stronghold of Baba Amr and people are dying from lack of medical care.
The United Nations is sending an humanitarian official to Damascus to negotiate access to civilians trapped by the seige.
French Foreign Minister Alain Juppe said in London on Thursday that maximum pressure needed to be exerted on the Syrian government
