mordant wit

Appeals for calm fail to halt reprisals.

Iraq's political and religious leaders were engaged in a desperate effort last night to stop the country from sliding into civil war after a huge bomb shattered the golden-domed mosque in the city of Samarra, one of Shia Islam's most revered sites.

At least six people were killed as demonstrations and armed clashes erupted across southern Iraq, and there were retaliatory attacks on Sunni mosques in Baghdad as thousands of furious Shia Muslims took to the streets. In an apparent reprisal attack, gunmen in police uniforms seized a dozen Sunni men suspected of being insurgents from a prison in the mainly Shia city of Basra and killed 11 of them, police and British forces said.