Alaska Airlines has grounded its entire fleet of Boeing 737 MAX-9 aircraft after a section of fuselage broke off mid-flight.

Alaska Airlines flight 1282, bound for Ontario, Canada, successfully made an emergency landing at Portland International Airport after the section of the plane separated from the aircraft body shortly after take off.

The plane took off from 5:06 p.m. local time on Friday, reaching an altitude of 16,325 feet. It landed safely at 5:26 p.m. No injuries of passengers and crew onboard have been reported so far.

Images and videos posted online show a rectangular section of the plane broken off, exposing the night sky and insulation material around the damaged area. People can also be seen sitting close to where the incident happened, although the seats directly next to the gap appear to be empty.