San Diego ? Military prosecutors have granted immunity to at least seven Marines and they may be called to testify at the trial of fellow troops accused in the slayings of 24 Iraqi civilians in Haditha, according to documents obtained by The Associated Press.

The orders were obtained from someone involved in the case who declined to be identified because the documents are not public.

The Marines who were granted immunity include an officer who told troops to raid a house and a sergeant who took photographs of the dead but later deleted them from his camera. The immunity orders ensure that any testimony the Marines volunteer cannot be used against them, making it highly unlikely charges will be brought against the men.

The Marine squad had suffered a fatality on Nov. 19, 2005, when its convoy was rocked by a roadside bomb blast. In the aftermath of the explosion, the troops are accused of killing 24 Iraqis, including women and children, in Haditha.