An alleged bomb threat Wednesday afternoon at Pittsburgh International Airport (PIT) resulted in an arrest, according to police.

Allegheny County police said the suspect, a 37-year-old Iranian national, was arrested after he allegedly claimed to be carrying a bomb in his luggage after he was refused entry on his American Airlines flight. He was arrested shortly after 4:30 p.m.

The suspect faced charges of terroristic threats and a threat to use weapons of mass destruction, but denied making a bomb threat and later ped guilty to disorderly conduct. No explosives were found in his possession, authorities confirmed.

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Passengers walking

Allegheny County police said the 37-year-old Iranian national was arrested Wednesday, May 10, 2023. (Jeff Swensen/Getty Images)

The incident started when the suspect arrived late for his flight to Philadelphia and airport staff refused to allow him to board, police said. He then allegedly told the American Airlines gate agents that his luggage contained a bomb. At least two airline workers confirmed hearing the comment to the police.

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Several planes

American Airlines at Pittsburgh International returned to normal operations after police briefly closed the B-concourse. (Jeff Swensen/Getty Images)

Police said more than 100 passengers on American Airlines flight 1862 were deboarded and the B-concourse was partially closed. The plane, an Airbus A319, was en route to Philadelphia.

"The aircraft was searched by Allegheny County Police officers and FBI agents. The Allegheny County Police Explosive Ordinance Disposal (EOD) Team and EOD K-9 handlers utilized police K-9s trained in the detection of explosive odor as well as x-ray machines to search the aircraft and luggage on board. Officers did not locate a threat on the aircraft or luggage, including the two checked bags belonging to [the suspect]," Allegheny County police said.

A photo of the airport

The FBI and the Transportation Security Administration are assisting in an investigation at Pittsburgh International.  (Bruce Bennett/Getty Images)

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The FBI and the Transportation Security Administration have joined in the investigation. TSA may also impose a civil penalty, police said.

American Airlines at Pittsburgh International has since returned to normal operations.

Editor's Note: This article has been updated to include the final resolution of the charges.