About fifteen people killed in clashes between Iraqi security forces, supporters of Shia cleric.

At least fifteen people have been killed in clashes between Iraqi security forces and supporters of a powerful Shia cleric in the capital, Baghdad.

Officials say dozens more were injured after protesters loyal to Moqtada al-Sadr stormed the presidential palace.

The violence began after Mr Sadr announced his retirement from politics.

His bloc won most seats in parliament last October, but he has refused to negotiate with Iran-backed Shia groups to form a government.