A Delta Air Lines flight on Sunday from Salt Lake City to Portland, Oregon immediately returned to Utah’s capital when the flight crew realized the Boeing (BA) 737-900 was suffering cabin pressurization issues.

Authorities are investigating a flight that turned around after the aircraft did not properly pressurize. Passengers bled from the ear and nose, local media said.

The Federal Aviation Administration is investigating after a Delta Air Lines flight with pressurization issues left some passengers with bleeding eardrums, headaches and bloody noses

Passengers said a pressurization issue on a Delta Air Lines flight Sunday left them with bloody noses and ears.

The FAA is launching an investigation into a Delta Airlines flight that was diverted back to Salt Lake City on Sunday.