South Sudan downs UN chopper

The UN on Friday said a helicopter from its peacekeeping mission in South Sudan has been shot down by the army, killing all four crew, believed to be Russians.
A spokesman said the aircraft was shot down while on a reconnaissance mission in eastern Jonglei state.
UN chief Ban Ki-moon strongly condemned the attack on the "clearly marked" helicopter. However, South Sudan's minister of information told the BBC that the cause of the incident was not clear.