BAGHDAD

Four people were killed and 18 others were wounded Wednesday in a bomb attack in a Shiite majority neighborhood in Baghdad, security sources said.
A bus rigged with explosives went off next to a market place in capital's northwest Al-Hurriya neighborhood causing serious damage to nearby buildings.

Since May 14, at least 290 people have been killed in a wave of bombings across Iraq, raising fears that the country might be dragged into an all-out sectarian conflict once again after a 2006-2008 Sunni-Shiite warfare. 

Following the US invasion in 2003, Iraq has seen a dramatic shift in power towards the country's Shiite majority who were largely oppressed under Iraq's late Sunni leader Saddam Hussein.

Sunnis claim that the al-Maliki government has grown increasingly hostile to the minority community following the December 2011 US withdrawal.