TWO suicide bombers blew themselves up yesterday in a crowd of police officers south of Baghdad, killing up to 30 people and wounding dozens, while US forces briefly detained a Sunni political leader on the second day of an Iraqi-led security sweep in the capital.

The leader of Iraq’s top Sunni party has been released after being mistakenly detained earlier today by US forces, the American military said.

US troops detained the head of Iraq's largest Sunni Muslim political party during a house raid in western Baghdad today, a top party official and police said.