The arrest of an army general from South Sudan's main opposition is a "grave violation" of the peace deal that ended a five-year civil war, an opposition spokesperson has told the BBC. Gen Gabriel Duop Lam was arrested earlier this week, along with other senior officials of the Sudan People's Liberation Movement in Opposition (SPLM-IO).

South Sudanese forces have arrested the petroleum minister and several senior military officials allied with First Vice President Riek Machar, Machar's spokesperson said on Wednesday, jeopardising a peace deal that ended a five-year civil war.

South Sudan's top oil and gas official has been arrested at home amid concerns that a peace deal struck in 2018 by long time rivals President Salva Kiir and First Vice President Riek Machar is in danger of unravelling.