The Committee to Protect Journalists has accused the US military of failing to fully investigate the killing of journalists by its forces in Iraq and to implement its own recommendations to improve media safety.

The CPJ claims that several of the 13 cases of media workers killed in Iraq suggest indifference by U.S. soldiers to the presence of civilians, including members of the press.

The Pentagon has dismissed the report.

A spokesman said: "The U.S. military investigates every credible report of a journalist's death in which U.S. forces may have been involved. To suggest otherwise simply does not reflect the facts."