Nightly News | December 21, 2013
>>> harrowing moments of the african nation of south sudan where three u.s. military aircraft came under fire while they tried to rescue american civilians caught up between rebels and forces in the world's newest independent nation. nbc's ron allen has more on this tonight.
>> reporter: today south sudan 's government sent hundreds of troops to the region where the u.s. air craft was attacked as the situation he escalates. three aircrafts were hit by small arms fire in bor. u.s. military members says four military members were wounded, the aircraft damaged. they diverted to uganda. the wounded were put on a plane to kenya for treatment. all in stable condition. they say it was unclear why the americans were targeted.
>> this is urban. it's tough to know who's friend and who's foe.
>> reporter: the rebels control the area. on friday a united nations helicopter came under attack. on thursday two u.n. troops and dozens of civilians were killed when a compound was stofrmtd all told, perhaps 500 people have been killed and tens of thousands have been undisplaced after an unsuccessful coupe attempt.
>> all of the properties are being bombed.
>> the u.s. has advised all citizens in south sudan to depart immediately. it's unclear how many remain. south sudan 's president now says he's ready to talk to the rebels. u.s. has sent envoy to help and regs skew meshamericans caught up in the conflict.