Russia demands action over UN helicopter downed in South Sudan

http://www.bbc.co.uk/news/world-africa-20824750

The helicopter was apparently shot down on Friday while on a reconnaissance mission in eastern Jonglei state.
The UN strongly condemned the "shooting down... of a clearly marked UN helicopter" by South Sudanese forces.
South Sudanese officials have given conflicting accounts of why the helicopter may have been downed.
"We call on the government of South Sudan to carry out the necessary investigation, punish the guilty and take every measure to guarantee that this never happens again," Russia's foreign ministry said in a statement.