Sudan warned it cannot continue the "vicious cycle" of negotiations with Egypt and Ethiopia in the long-running dispute over Addis Ababa's controversial Blue Nile mega dam.
The US is set to open a consulate in the contested Western Sahara.
The army revealed that four members of the Tigray party were killed after they were targeted in a military attack.
A German professor has been called in to lead the UN mission in Sudan.
Special envoy Martin Griffiths arrived at Aden airport, where he expressed his condolences and emphasised the need for a solution to the conflict.
Benjamin Netanyahu has condemned the recent violence in the US Capitol as he met with Steve Mnuchin after his trip to Sudan.
Ethiopia has accused Sudanese forces of looting and killing civilians amid an ongoing dispute over a fertile border area.
The Israel-Morocco accord agreed late last year fell short of pledges to open embassies.
The meeting was the first time a Qatari official visited Egypt since the Saudi-led blockade began in 2017.
Sudan has been de-blacklisted and given access to $1 billion in financing from the World Bank as the northeast African state signs to normalise relations with Israel