Flight MH128 from Melbourne to Kuala Lumpur had been in the air for just 14 minutes when the captain made the decision to return to the plane's departure airport after being alerted by cabin crew of the "disruptive passenger".
A MAS statement said the flight was diverted due to a disruptive passenger.
It gave no other details of the incident.
A group of incredibly courageous passengers were able to hold the man down before the pilot turned the flight around and back to Melbourne Tullamarine.More news: Indian court suspends controversial cow slaughter ban
Andy said he tackled the man, who managed to get back to his feet and run towards the back of the plane, where a group of other male passengers detained him.
Malaysia Airlines stated that 'at no point was the aircraft hijacked'. Eleven passengers reportedly help subdue the man at the back of the plane until it landed and armed police boarded the aircraft to remove the suspect.
Photographs on the Australian Broadcasting Corporation website showed black-clad armed officers on board the plane.
The minister said the man was holding a "powerbank", or phone charger, while Mr Leoncelli described it as a "giant black object".
The airline has struggled to recover from the twin tragedies, having to cut staff and restructure its business as passenger numbers fell.More news: PS Plus June 2017 Free Games: Here's what to expect next month
The incident is the latest in a string of incidents to hit the airline in recent years.
Victoria Police confirmed that the man did not gain entry to the cockpit.
In a few months after MH370 went missing, Flight MH17 from Amsterdam to Kuala Lumpur was shot down in eastern Ukraine.
Passengers have been safetly removed from the plane are being accommodated at hotels or offered additional flights.More news: Tiger Kills Zookeeper in England