CAIRO — Sudan’s paramilitary Rapid Support Forces launched a drone attack Sunday targeting a military airbase and civilian facilities in the coastal city of Port Sudan, the military said.

Explosions have been heard in the Sudanese city of Port Sudan as a paramilitary force targeted the de-facto capital of the country's military-led government for the third consecutive day. Thick black smoke could be seen at dawn on the skyline of the previously safe city where thousands of people fleeing the two-year civil war have sought refuge.