Gun found in air passenger's bag

Ryanair staff discovered the gun during checks. File pic

VASTERAS, Sweden (CNN) -- A passenger attempting to board a flight to London was arrested Thursday after a gun was found in the passenger's carry-on luggage, the airline said.

The passenger was passing through a security checkpoint at Vasteras Airport when the gun was found prior to boarding, said Ryanair, an Irish budget airline.

The passenger, whose name was not immediately released, was trying to catch Ryanair Flight FR685 to London. The flight had 189 passengers booked on it, the airline said.

"The security staff at the airport and local police are now interviewing all the passengers as a precaution, and they are carrying out a thorough search of the aircraft before clearing it," Ryanair said in a statement.

Further details were not immediately available, such as the type of gun allegedly in the passenger's possession and whether the passenger was a male or female.

Vasteras is a city of 125,000 about 40 miles west of Stockholm.