The number of United States military personnel killed in Iraq since the US-led invasion five years ago
The number of United States military personnel killed in Iraq since the US-led invasion five years ago has passed the 4,000 mark, BBC News reported.
The latest to die were four soldiers whose patrol vehicle was blown up by a bomb in southern Baghdad on Sunday.
In response to the news, US Vice-President Dick Cheney said he regretted every US casualty in Iraq.
Insurgent attacks and military operations left at least 47 people dead across Iraq on Sunday.
According to an Associated Press breakdown of the figure, 97% of deaths occurred after US President George W Bush declared on 1 May 2003 that major combat was over.
Roadside bombs accounted for 44% of deaths last year and 55% to date in 2008, the agency adds.