Denver, May 22 (IANS): Denver-based Frontier Airlines confirmed that it is investigating the conduct of a male passenger who allegedly touched two women in an unwelcome manner and urinated inside the plane cabin during a flight last week.

The incident occurred on May 17 aboard Flight 864 from Denver to Charleston and the local police arrested the man 30 minutes after the aircraft landed, Efe news reported quoting the airline. The flight which left Denver at 3 p.m. lasted for three-and-a-half hours.

According to the airline, it had "been made aware of this situation" and is working with the "appropriate authorities" to investigate the man's behaviour.

However, it didn't provide any further details about the accusations made by other passengers on the flight, who claimed that he physically and verbally harassed two women and then urinated on the back of the seat in front of him.

As stated in the complaint filed against the man, later identified in FBI documents as Michael Allen Haag, he consumed two double vodka tonics during the flight and seemed to be "intoxicated and possibly high", according to a passenger.

A female passenger said that the man apparently touched a sleeping woman and then began asking another woman questions about her sex life.

She added that the flight crew merely "warned" the man over his behaviour but took no other action to ensure that he did not continue with it following which she decided to start photographing the man.

Meanwhile, Frontier spokesman Richard Oliver said, "The safety and security of our passengers is the top priority at Frontier."