Lyon (France): An Easyjet flight from Lyon to Porto was forced to return shortly after take-off when a passenger suffering from delirium attempted to break into the cockpit, news agency AFP reported, citing French police and the airline, on Saturday.

The incident occurred late Friday aboard flight EJU4429, which had just departed Lyon for Porto.

The man was restrained by fellow passengers until the aircraft landed back in Lyon, police said.

In a statement, Easyjet said: "Flight EJU4429 from Lyon to Porto returned back to Lyon shortly after take off due to (the) behaviour of a passenger onboard. The flight was met by police on arrival and once the passenger was removed by police, the flight continued onto Porto."

Police identified the passenger as a 26-year-old Portuguese national.

Medical examinations revealed he was suffering from airsickness and delirium.

He was later admitted to a French hospital.