The Royal Military Police (RMP) has written to BBC Panorama, requesting any materials claimed to be evidence of alleged crimes committed by British Forces in Afghanistan.
It follows an investigation programme by Panorama that reportedly uncovered 54 suspicious killings carried out by one British SAS unit on a six-month tour of the country in 2010 to 2011.
Other media groups were also contacted by the RMP, the Ministry of Defence (MOD) has confirmed, so that any such content can be reviewed.
The MOD press office tweeted: "We can confirm that the Royal Military Police have written to Panorama and other various media organisations who claim to have new evidence of crimes allegedly committed by British Armed Forces in Afghanistan.
"The Royal Military Police has requested this material is provided at the earliest opportunity so it can be reviewed."
The Panorama episode, aired on Tuesday, alleged that SAS soldiers killed detainees and unarmed men in suspicious circumstances during counter-insurgency operations.
It also claimed that senior officers did not report the alleged killings and did not disclose information to the military police.
The MOD said it believes the programme "jumps to unjustified conclusions from allegations that have already been fully investigated" and that "two Service Police operations carried out an extensive and independent investigation into allegations about the conduct of UK forces in Afghanistan".
It said neither investigation "found sufficient evidence to prosecute" and added that "insinuating otherwise is irresponsible, incorrect and puts our brave Armed Forces personnel at risk both in the field and reputationally".