Port Sudan is the main entry point for humanitarian aid into Sudan. A spokesman for UN chief Antonio Guterres said the drone strikes 'could lead to large-scale civilian casualties and further destruction of critical infrastructure.

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.

Intensifying drone attacks on civilian infrastructure in Sudan, particularly in the eastern city of Port Sudan, are raising grave concerns for the safety of humanitarian staff and operations, a United Nations spokesperson said on Tuesday.