Floods killed two 17-year-old girls in Erie area in Heiban County of Nuba Mountains.
An eyewitness Kuku Lugudan told Voice of Peace Radio that the girls were working in the farm on Thursday.
He said after heavy rain that lasted for three hours they were drowned while crossing one of the streams.
Mr Lugudan said the deceased were friends who work together.
He added that floods washed out crops in the farms around the stream.