Sudan Air Force planes on Tuesday bombed Tonguli area of Dalami County in Nuba Mountains, killing two civilians and injuring another two.
SPLM-North spokesperson Arnu Ngutulu Lodi said in an emailed statement that the bombardment completely destroyed one clinic.
He said one Antonov plane dropped four bombs in the residential area.
Mr Ngutulu added that there were reports of aerial attacks in the same area on Wednesday but he did not give details.
Sudanese Government Antonovs and MIG jet fighters are bombing civilian targets in the SPLM-North controlled areas since war broke out in June 2011.