Local authorities began evacuating hundreds of thousands of pilgrims from the Iraqi city of Kerbala on Tuesday (August 27) as a battle raged between Iraqi security forces and gunmen near two of Shi'ite Islam's holiest shrines. A senior security source in Baghdad said 25 people had been killed, mostly policemen. The director of Kerbala's al-Hussein Hospital said it had received eight bodies. Interior Ministry spokesman Brigadier-General Abdul Kareem Khalaf told state television 50 people had been killed and wounded in the violence. The fighting, which first broke out on Monday night (August 27), appeared to be between gunmen loyal to the fiery Shi'ite cleric Moqtada al-Sadr, possibly members of his Mehdi Army militia, and police linked to the rival Shi'ite political movement, the Supreme Iraqi Islamic Council (SIIC) and its Badr Organisation. Police said a curfew had been imposed and buses were being organised to evacuate the pilgrims, most of whom had walked from Baghdad and elsewhere to mark the 9th century birth of Mohammad al-Mahdi, the last of 12 imams Shi'ites revere as saints. Reuters witnesses in the city, 110 km (68 miles) south of Baghdad, could hear the sound of intense gunfire and rocket-propelled grenades being fired and saw columns of smoke rising from the centre of the city, apparently from cars that police said had been set ablaze. Police said gunmen armed with automatic weapons and pistols were trying to take control of the area around the Imam Ali and Imam Abbas shrines, the focal point of Tuesday's ceremonies.