Explosions and fires rocked Sudan’s main port city and wartime capital Port Sudan on Tuesday, a witness said, part of a days-long drone assault that has torched the country’s biggest fuel depot, damaging the most important gateway for foreign aid.

Sudan's paramilitary Rapid Support Forces launched a second drone strike in as many days on Port Sudan, targeting fuel depots in the eastern city early on Monday, security sources told Reuters, in a major escalation of a two-year-long conflict.