THE Australian Federal Police is investigating a suspicious device discovered on a plane that landed at Perth Airport.

The device was discovered by a cleaner under a passenger seat following an international flight that arrived on September 16.

A source claimed the contraption consisted of matches, a lighter and a small gas cylinder, though the AFP declined to confirm or deny this.

“The Australian Federal Police can confirm it was notified of an unusual item found on board a flight which landed into Perth International Airport on Sunday afternoon (September 16, 2018),” a spokesman said.

“The item was assessed by AFP members and determined to pose no threat to the safe operation of the aircraft.

“Inquiries into this matter are ongoing, as such it would not be appropriate to provide further comment at this time.”

A source told The Sunday Times: “They found matches and a lighter strapped to a mini gas bottle taped under a seat.”

Perth Airport last night said it couldn’t provide any further details as the matter was being investigated.

“At Perth Airport the safety and security of the travelling public is our number one priority,” a spokesman said.

“The AFP are investigating an incident the occurred on 16 September and as such no further comment can be provided.”