A statement by the army said the attack took place at a graduation ceremony at the Gibet army base, about 100 kilometres from the army's de facto capital Port Sudan in Sudan's Red Sea state, and that five people were killed.

The drone attack is the latest in a string of such attacks on army locations in recent months, and the closest to Port Sudan.

The paramilitary Rapid Support Forces (RSF), the army's rival in the war, has not claimed responsibility for any of them, and did not comment this Tuesday's incident.

The strike comes a day after the army-aligned foreign ministry conditionally accepted a United States invitation to talks in Switzerland in August. The RSF responded to the ministry's statement saying it would only negotiate with the army and not the Islamists who make up a large part of the civil service.

--Reuters--