KHARTOUM, Sudan—A Sudanese jetliner landed in a thunderstorm and veered off the runway late Tuesday, bursting into flames and killing dozens of people, Sudanese officials said.

Official and state media said immediately after the crash that about half the 203 passengers aboard the Airbus A310 had been killed in the crash around 9 p.m. But several hours later officials began reporting a lower toll. One flight attendant said the crew had evacuated the passengers from the plane. “Thank God we were able to get all the passengers out,” said Sarrah Faisal, her voice shaking as she spoke to Sudanese TV from a stretcher, wearing a plastic neck-brace. She gave no more details. Deputy parliament speaker Mohammed al-Hassan al-Ameen said the death toll was “about 30 people.” Police spokesman Mohammed Abdel Majid al-Tayeb said five bodies had been pulled from the wreckage, 100 people were safe and an unspecified number were hospitalized.