Jet Airways.

On Thursday, after pilots on a Jet Airways flight from Mumbai to Jaipur allegedly failed to pressurize the cabin, passengers were subjected to an oxygen-depleted environment, which caused some to bleed from their noses and ears.

Oxygen masks unfurled, and the flight returned to Mumbai approximately 45 minutes after it originally left.

Hindustan Times quotes Lalit Gupta of the Directorate General of Civil Aviation (DGCA), who said that “thirty out of 166 passengers experienced nose and ear bleeding, some also complained of headache.”

Per Hindustan Times:

The crew has been taken off duty and Aircraft Accident Investigation Bureau (AAIB) has started an investigation, DGCA added. Ministry of Civil Aviation has requested DGCA  to file its report immediately on the issue.

According to passenger Darshak Hathi, who recorded the video below, there was no oxygen coming through the masks. However, The New York Times notes that a spokesperson for the airline denies Hathi’s claim regarding the masks.