NEW : Crude bombs , tear gas and gunfire rock Dhaka . NEW : At least four people were killed in Sunday 's protests . Street battles went on for hours , with police firing rubber bullets and tear gas and the Islamists hurling crude explosives and chunks of brick . NEW : The government calls on protesters to leave ; leaders say they 're staying . Score: 6
NEW : Crude bombs , tear gas and gunfire rock Dhaka . NEW : At least four people were killed in Sunday 's protests . NEW : The government calls on protesters to leave ; leaders say they 're staying . Score: 6