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Six British men were arrested after allegedly becoming aggressive on a Ryanair flight to Bratislava Reuters

Six British members of a stag party have been arrested after alleged drunken behaviour forced a plane to make an unscheduled landing in Berlin, police said. According to reports the men became aggressive when refused further alcohol.

The group was flying to Slovakian capital Bratislava, with the groom among those arrested when the flight landed at Berlin's Schoenfeld Airport. They were later released but face fines of up to €25,000 (£20,000) if found guilty of endangering flight security, as well as civil claims from the airline.

The group of six from Southampton became drunk and ignored instructions from aircraft crew, Berlin police said in a statement. According to local media they became aggressive when refused alcohol and one of the members of the group undressed.

After the six men, aged between 25-28 were arrested in Berlin, the remaining 164 passengers on the plane were able to continue the journey to Bratislava.

There has been a sharp rise disorderly behaviour on aircraft in recent years, low-cost carrier Jet2 said in June 2015. The company together with other industry bodies is leading a crackdown on unruly behaviour on flights. Ministers are considering introducing new legislation blocking passengers who drink too much in airports boarding flights, the Times reported in September.

In November, a drunk female passenger on a British Airways flight from Boston to London had to be restrained after attempting to open an exit door during a flight.