Medics said three people were killed on Saturday when security forces fired shots and tear gas to disperse protesters in the nearby city of Omdurman,
However, the interior ministry has denied that live rounds had been fired.
The army seized power last Monday, detaining Prime Minister Abdalla Hamdok and other civilian leaders.
Meanwhile; the United Nation’s Sudan envoy, Volker Perthes has met Hamdok at his residence whom he said was well but remains under house arrest.
