They number several 10,000 persons .
The Krongo Nuba are a sub-ethnic group of the Nuba peoples in the Nuba Mountains of South Kordofan state , in southern Sudan .
peoples number several 10,000 persons .
The Krongo Nuba are a sub-ethnic group of the Nuba peoples in the Nuba Mountains of South Kordofan state , in southern Sudan .