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 leaving Salt Lake City last weekend developed cabin pressure issues and left some passengers with bleeding eardrums,

The flight was traveling from Salt Lake City to Portland, Oregon, when the plane experienced a pressurization problem — leading to bleeding eardrums, headaches, and bloody noses for some passengers.