The flight had only left the airport a few minutes before the incident with the passenger began.
The passenger from economy class jumped up just after take-off and claimed he had a bomb.
The statement gave no other details of the incident.
A statement from the airline said it turned back due to a "disruptive passenger".
Passengers worked with the flight crew to subdue the man.
The Malaysia Airlines flight has since landed safely and the passenger has been apprehended by airport security. According to reports, passengers tackled the man as he attempted to enter the cockpit.
Passengers who were onboard MH128 however are still in Melbourne Airport with their bags still on the flight.
All other flights were diverted to Avalon, near Geelong, with Melbourne Airport in lockdown at the time. Malaysia's deputy transport minister, Abdul Aziz bin Kaprawi, told AFP the item was not a bomb, but a "powerbank".
About three minutes later the same male voice can be heard saying the passenger was "claiming to have an explosive device, tried to enter the cockpit, has been overpowered by passengers".
Heavily armed police boarded the plane after it returned to Melbourne. The flight was around seven hours away from Kuala Lumpur.
The incident is the latest involving the Malaysian airline that is still missing MH370 that disappeared in 2014 and had MH17 shot down in Europe a year later.
The passenger was later arrested by Australian authorities in Melboure. "At the moment, the airline does not wish to make any premature conclusions until a full investigation has been concluded".
Passengers were screened upon disembarkation and put up at hotels, and will be offered seats on alternative flights.
The 18th seed, fired a total of 20 aces, including six in the first set alone, which he raced through in 30 minutes on Tuesday. Konta, 26, is yet to win a match in the main draw at Roland Garros after three successive first-round losses.
The 32-year-old had played only 37 minutes all season after coming off the bench in last weekend's win against Everton. Whatever the future holds for Wenger, he said the current Arsenal team can look forward with optimism.
The previous year, many students and teachers said that components of the JEE (Advanced) were particularly challenging. The paper contained a mix of single choice, multiple correct choice and passage type single choice question.
Trump asked top intelligence officials to defend him against claims that his campaign collaborated with the Russian government. Kushner is a senior adviser to the President and is influential in policy matters. "Kushner not going anywhere, I'm told".
Another senior official from the delegation said, "Each one of us is following developments in USA tax policy very closely". The aim for the G7 and central bankers on Saturday is to join forces to fight the growing threat of worldwide cyber attacks.
Showing all of his class and experience, Oracle skipper Jimmy Spithill refused to give in and gradually clawed his way back. Crewmen on SoftBank Team Japan had to leap clear of Ainslie's port hull as it crashed onto their starboard hull.
One of the few times Gustafsson didn't just evade Teixeira's lunge was in the third round, when he almost finished the fight. He went into the fifth round against Glover Teixeira on Sunday but didn't require the judges.
Indian army Tuesday claimed it had damaged some Pakistani army posts on LoC and described it as "punitive fire assaults". Two groups of terrorists managed to cross the LoC even during winter when the mountain passes were covered with snow.
She paired the one shoulder, thigh-high slit gown with Chloe Gosselin's platform shoes and De Grisogono diamond earrings and cuff. She didn't seem too upset by the fashion faux-pas, and was later seen partying the night away with her fellow models.
The move is an abrupt shift from past instructions that have mostly told civilians to stay in place until the fighting is over. The enclave covers mainly the Old City centre and three adjacent districts alongside the western bank of the Tigris river.
In light of that need for roster enhancement, this could have been the last parquet party for a fair number of those in uniform. The deficit reached a peak of 37 points, the second worst under Brad Stevens to the 50-point lead the Cavs reached in Game 2.
Mother of Tamir Rice relieved officer fired
In 2015, a grand jury declined to criminally charge Loehmann in the Rice shooting. "We still need accountability". Garmback was suspended for 10 days for violating a tactical rule for his driving that day.
Have become member of every family: Modi
Prime Minister Modi will depart for Hotel Adlon Kempinski at Palaisaal to attend the Indo-German Business Summit 2017. To our mind, terrorism is the gravest challenge facing humanity.
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Abedi spent time in Libya before the attack and transited through Istanbul and Dusseldorf airports on his way back to Britain. She said: "The public should be clear about what this means - a threat level of severe means an attack is highly likely".
Cavs beat Celtics to earn NBA Finals rematch with Warriors
James had earlier been whistled for his fourth foul with nearly seven minutes left in the first half, sending him to the bench. The Cavaliers outscored the Celtics 65-42 in the second half, thanks to Irving's playoff career high in points.
Cleveland Cavaliers reach the NBA Finals
He also added eight rebounds, eight assists and three steals as the Cavs romped to a 135-102 victory and a 4-1 series win. LeBron and Kyrie combined for 28 third-quarter points, with Irving going for 13 points and four assists in the frame.
Intel spat adds to Israeli concerns about Trump visit
The wall is in the Old City, a part of east Jerusalem , which the US and most of the world consider to be occupied territory. Trump said as a candidate he would move the embassy to Jerusalem , but now says he's studying the issue.
With budget unfinished, Legislature heads to special session
There were other complications with the one-page special session agreement hurriedly drafted Monday among the state's top leaders. On Wednesday, the House approved bills for taxes, education and transportation, with senators doing the same with taxes.
Wenger seeks solace in quest for seventh FA Cup
A game of football or a concert is a moment that you must live with passion and enthusiasm. "I just want to enjoy my football". He can think what he wants. "For this reason, I hope to see a great game and all my players trying to win for us", Conte said.
Exeter champions after extra-time win over Wasps
Short is Exeter's top try-scorer this season, scoring 11 tries in the Premiership and going over 14 times in all competitions. The game also marked England worldwide Danny Cipriani's return to Wasps after he rejoined from Sale Sharks over the summer.