Explosions have been heard at the Port of Sudan, a critical lifeline and entry point for aid, as attacks on the city continued for a fourth day in the latest confrontation between Sudanese Armed Forces (SAF) and the paramilitary Rapid Support Forces (RSF) in the country’s brutal two-year civil war.

Sudan's army said its anti-aircraft systems intercepted drones targeting a naval base in the wartime capital Port Sudan on Wednesday. Explosions were heard in the city, though it was not immediately clear whether they were near the Flamingo base.

Sudan's paramilitary Rapid Support Forces unleashed drones on the Red Sea city of Port Sudan early Tuesday, hitting key targets there, including the airport, the port and a hotel, military officials said.