A Chicago-bound United Airlines flight was forced to return to San Francisco International Airport early Saturday after running into engine trouble.

United flight 158 carrying 249 passengers and crew members landed safely about 30 minutes after takeoff after one of its engine compressors stalled, said UAL spokeswoman Robin Urbanski. The pilot was able to turn the plane around and return to the airport, flying on the aircraft’s second engine.

Smoke entered the cabin after the plane landed and the engines were shut down, Urbanski said. The airline was investigating the source of the smoke. There were no reported injuries.

The airline provided overnight accommodation to the passengers and arranged flights for them Saturday.