A US soldier and a foreign contractor were killed alongside two Afghan soldiers died in the latest suspected insider 'green on blue' attack in Afghanistan. The nationality of the contractor has not been confirmed.
The deaths occurred in the Wardak province, according to the International Security Assistance Force. Provincial government spokesman Shahidullah Shahid said:
Initial reports indicate that a misunderstanding happened between Afghan army soldiers and American soldiers.
More top news
People are being encouraged to post pictures of themselves sleeping in "weird" places in a bid to raise money to tackle homelessness.
A British military ship carrying supplies and off road vehicles has arrived in Ebola-hit Sierra Leone
Sam Burgess is ready to show what he can do in rugby union following his code switch, after defending his decision to leave league