Four people were injured, two critically, in the crash of a South African Airlink Jetstream 41 turboprop Thursday. The aircraft had just departed Durban on a positioning flight to Pietermaritzburg when the crew declared an emergency due to an engine failure. The airplane crashed near a school perimeter shortly after. Both pilots were injured critically, and a flight attendant suffered serious injuries. An employee working on the school’s grounds was also slightly injured. There were no passengers aboard.