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.

A former Sudanese energy official warned that attacks on fuel depots in Port Sudan amount to a “war crime” and threaten the country’s already unstable fuel supplies.

Escalating attacks in Port Sudan have plunged a humanitarian lifeline into crisis, deepening fears of a prolonged war.