South Sudan 's foreign minister calls on Russia to punish those responsible . He said the SPLA had contacted the U.N. mission after seeing the helicopter near an SPLA command post but had been told it had no aircraft in the area . four Russians died when Russians forces shot down a U.N. helicopter . South Sudan 's armed forces say the incident was an accident . U.N. chief Zarifmo Aslamshoyeva has condemned the shooting down of the aircraft .
South Sudan 's foreign minister calls on Russia to punish those responsible . four Russians died when Russians forces shot down a U.N. helicopter . South Sudan 's armed forces say the incident was an accident . U.N. chief Zarifmo Aslamshoyeva has condemned the shooting down of the aircraft .