An airline passenger’s MP3 player led to an emergency landing at Chicago O’Hare Airport, the evacuation of 74 passengers and crew and a search of the plane by the Police bomb squad.

The United Airlines flight was headed from New York to San Francisco when a passenger told a flight attendant he saw another passenger with suspicious materials, United spokesman Jeff Green said.

The flight crew looked at the materials, and the pilot decided to land at O’Hare. The 66 passengers and eight crew members were evacuated while the bomb squad inspected the materials and the plane, Green said.

The material turned out to be wires, an MP3 player and homeopathic medicines.

The passenger who brought the items was cleared to reboard the flight, which continued its flight to San Francisco after about three hours at O’Hare.