An American serviceman is in custody in Iraq, in relation to the deaths of two of his colleagues.
Specialist Neftaly Platero was in pre-trial confinement after an incident in Fallujah, 40 miles (65km) west of Baghdad, a US forces spokesman said.
A "verbal altercation" broke out among four soldiers last Thursday and the suspect "allegedly took his weapon and began shooting the other soldiers", said the spokesman, Col Barry Johnson.
An investigation is underway.
Read More: http://www.bbc.co.uk/news/world-middle-east-11424987