Suicide bombers struck a crowded Shiite mosque in Kabul late today, killing at least four and wounded eight others. The bombers blew themselves up in the kitchen of Al Zahra mosque after police prevented them from entering the prayer hall packed with worshippers. No group has so far claimed responsibility for the assault. <br/><br/>The carnage comes at a time Kabul is already on edge following a wave of deadly bombings, which triggered angry public protests calling for the resignation of President Ashraf Ghani's government over spiralling insecurity. <br/>'<br/><br/>