suicide bomber has killed at least 28 people queuing outside a police recruitment centre in the Iraqi capital Baghdad, police say.
At least 57 other people were wounded in the attack, carried out by a bomber on a motorcycle.
Meanwhile, the US military says it is to reduce troop numbers in the country by 12,000 in the next six months.
The level of violence in Iraq has declined since 2007, but it remains a feature of daily life for many Iraqis.
At least 12 people died two days ago when a car bomb exploded at a cattle market in Babil province.
There are still almost daily violent incidents in Baghdad.







