An Egyptian policeman tries to extinguish a police vehicle set on fire by Muslim Brotherhood supporters on a ring road in the capital, Cairo, on January 3, 2014 as thousands of protesters backing deposed president Mohamed Morsi rallied across the country before police moved in to disperse them, sparking clashes. Picture: AFP.

13 killed in Egypt clashes

Supporters of the Muslim Brotherhood clashed with police across Egypt defying a widening state crackdown.