The Ministry of Defence said "inappropriate actions will not be tolerated" after photos emerged appearing to show an RAF serviceman giving a thumbs-up sign next to the body of a dead Taliban fighter.
An MoD spokesman said:
Inappropriate actions will not be tolerated in the armed forces; the RAF is treating this incident extremely seriously and has launched a military police investigation.
As this incident is subject to an ongoing investigation it would be inappropriate to comment further at this time.
More top news
Nick Clegg has insisted on more education spending in any coalition deal. But has he learned his lesson since the tuition fees fiasco?
Burnley have banned 21 people for life following violent scenes after a Championship match last season.
Anis Abid Sardar is alleged to have made the roadside bombs which killed Sergeant first class Randy Johnson in Iraq in 2007.