- An intruder allegedly boarded an empty passenger jet at London Heathrow on Saturday
- It was claimed he was able to lock himself in the bombproof cockpit
- A 38-year-old man is due in court in London on Monday
(CNN)A major security alert took place at London's Heathrow airport when an intruder allegedly locked himself in the cockpit of an empty airliner.
It's claimed the man breached security on Saturday morning by scaling a perimeter fence, breaking through a cordon and climbing aboard a parked British Airways Boeing 747.
He then allegedly fled from the cabin of the passenger jet into the cockpit and locked himself behind the bombproof doors.
The high-security doors are designed to protect the pilot and co-pilot in the event of a terrorist attack or mid-flight highjacking attempt.
The police are reported to have been called to the scene at 11.30 a.m. on Saturday.
Heathrow is the world's sixth busiest airport, serving close to 75 million passengers a year.
Saturday's alleged events follow an incident in December in which a man was disarmed at Heathrow by cabin crew after stabbing himself in the head.
London's Metropolitan Police confirmed in a statement that a 38-year-old man, Louis Pedro Verdasca dos Santos Costa, will appear in court on Monday.
He's charged with unlawfully being airside, and of unlawfully being on an aircraft.