This is the dramatic moment police boarded a plane to arrest a passenger who allegedly groped the woman sitting next to him.

Officers were called onto the VietJet flight when the man reportedly touched the legs of the female beside him as the aircraft prepared for departure on December 15.

Passengers were settling into their seats when the woman allegedly began yelling, claiming the man had rubbed her inappropriately.

Footage shows flight attendants surrounding the suspect before police rushed onboard to eject him from the Airbus A320 in Hanoi.

When officers tried to remove him, the man resisted the cops by going limp, forcing them to drag him off his seat as stunned passengers looked on.

The alleged groper was later hauled away by officers from the Vietnamese People's Public Security forces and detained for questioning.

The filmer, who said the suspect was a South Korean national, added: 'You shouldn't cause trouble in other countries, right? Of course, he should be taken away. It's good that it happened before takeoff.'

Groping incidents have become a growing problem on planes, especially during crowded boarding or take-off when passengers are confined in close quarters.

On January 8, Lithuanian tourist Paulius Krilavicius, 45, allegedly touched a woman inappropriately on a British Airways flight from Newark, New Jersey, to London Heathrow.

He was said to have thrown his arms around the terrified female passenger and tried to drag her onto his lap before she called for help. Bizarrely, he avoided jail and instead received a nine-month jail term suspended for 18 months.

While in December last year, Indian shipping boss Javed Inamdar, 34, was said to have molested a schoolgirl, 12, on a British Airways flight from Mumbai to Heathrow.

He reportedly touched the sleeping girl under her clothes, before she woke up and started crying and screaming. During questioning, he told police he was in a 'deep sleep' and had mistaken the youngster for his wife.

Javed was sentenced to 21 months in prison in November this year.