A San Francisco-bound Southwest Airlines flight was diverted to Ontario International Airport after reports of smoke by the cabin crew.

The Southwest pilots were reportedly given oxygen masks, as required by safety procedures, and the Boeing MAX-8 plane landed safely at Ontario International Airport shortly before 8:30 p.m. on Sunday. It had taken off from Phoenix Sky Harbor International Airport just after 7:30 p.m.

A Southwest flight bound for San Francisco International Airport was diverted to Ontario International Airport Saturday evening after the smell of smoke was detected in the aircraft, according to Southwest Airlines.