Seven Royal Marines have been arrested on suspicion of murder, the UK's Ministry of Defence (MoD) has said.
A statement said the arrests on Thursday by the Royal Military Police related to an incident in Afghanistan in 2011.
It said the incident followed an "engagement with an insurgent" but no civilians were involved.
The ministry statement did not name the marines or give any further details of the incident.
An MoD spokesman said: "The Royal Military Police have today arrested seven Royal Marines on suspicion of murder. The arrests relate to an incident in Afghanistan in 2011.
"The incident followed an engagement with an insurgent; there were no civilians involved. The investigation will now be taken forward and dealt with by the service justice system.
"These arrests demonstrate the Department and the Armed Forces' determination to ensure UK personnel act in accordance with their rules of engagement and our standards.
"It would be inappropriate to make any further comment while the investigation is under way."
BBC News
Interesting.