World

A string of explosions tore through central Baghdad within minutes of each other on Thursday, followed by a co-ordinated assault by gunmen who raided a government building and battled security forces in the streets. The attack left at least 22 people dead and dozens wounded.

The fighting lasted about an hour, ending with security forces storming the building, killing the gunmen and evacuating hundreds of people who had hunkered down in their offices, according to police.

There was no immediate claim of responsibility, but the attack bore the hallmarks of al-Qaida's Iraqi arm. The group, known as the Islamic State of Iraq, frequently uses car bombs and co-ordinated blasts in an effort to undermine Iraqis' confidence in the Shiite-led government.

The attack erupted shortly after midday in Baghdad's Allawi area, a largely commercial area is home to the Iraqi National Museum and the city's main bus station.

At least two blasts, including one car bomb and another believed to be from a suicide bomber, went off near a building currently housing the Justice Ministry. A police officer who was among the troops sent to clear the area said that approximately six gunmen wearing police uniforms quickly stormed the building.

"Everybody panicked (after the first blast) and seconds later we heard a second explosion. I looked through the window and I saw some gunmen wearing police uniforms entering the building. We knew that these policemen were fake," said Asmaa Abbas, a Justice Ministry employee who was working in her third-floor office.

A gun battle quickly broke out between the intruders and security forces, as other explosions went off near the bus station and the headquarters for a VIP protection force that provides bodyguards for lawmakers, government ministers and other senior officials.

After about an hour, security forces stormed the building and some of the gunmen detonated explosives they were wearing, the officer on the scene said.

Thursday's attack took place about a kilometre (two-thirds of a mile) away from the heavily fortified Green Zone, which houses several foreign embassies and Iraqi government offices.

Violence in Iraq has subsided from its peak in 2006 and 2007, but deadly attacks remain frequent a decade after the U.S.-led invasion of March 20, 2003.

-- Associated Press writers Qassim Abdul-Zahra and Sameer N. Yacoub contributed to this report.