A passenger allegedly relieved himself on another traveller, sparking a massive brawl on board an Air Meditarranee flight, French media report.

The plane was flying from Algiers to Paris when the mid-air drama unfolded yesterday afternoon, forcing the aircraft to divert to Lyon.

Passengers described a scene of chaos as a shirtless man who was allegedly responsible for the bizarre incident was overpowered by crew.

Flight ML2673 was halfway through its 90-minute journey when one of its 166 passengers reportedly became unruly because he wasn’t allowed to smoke or drink alcohol on board, French media reported.

He allegedly urinated on a fellow passenger and caused a fight that ended with him being pinned down and detained by flight attendants.

For safety reasons the pilot decided to land the Airbus A321 at Lyon’s international airport, where the man was escorted off the aircraft by police.

A second man who was involved in the fight was also removed from the plane.

The plane eventually took off again and passengers arrived at Paris’ Charles de Gaulle Airport three hours behind schedule.