In the 18-second video, a woman in a red dress is seen straddling a man in the back seat of clearly marked white UN vehicle.

A video of a sex act in a United Nationโ€™s vehicle, which has gone viral on social media, has shocked chief of UN.

The UN in a statement said that it was โ€œshocked and deeply disturbedโ€ by the footage of the alleged sex act in one of its official cars in Israel.

โ€œWe are shocked and deeply disturbed by what is seen on this video,โ€ BBC quoted Stephane Dujarric, the spokesman for the UN Secretary-General Antonio Guterres, as saying.

In the 18-second video, a woman in a red dress is seen straddling a man in the back seat of clearly marked white UN vehicle.

Another man appears to be asleep in the passenger seat. The clip was shared widely on social media on Friday.

Describing the behaviour seen in the 18-second video as โ€œabhorrentโ€, he said an investigation led by the UNโ€s Office of Internal Oversight Services was โ€œmoving very quicklyโ€.

That kind of behaviour โ€œgoes against everything we stand for and having been working to achieve in terms of fighting misconduct by UN staffโ€, Dujarric said.

The UN has strict policies against sexual misconduct by its staff members.

Dujarric said the identification of the individuals seen in the video was โ€œclose to being completedโ€.

โ€œWe expect the process to be concluded very quickly and intend to promptly take the appropriate action,โ€ he said.

In 2019, there were 175 allegations of sexual exploitation and abuse against UN staff members, a report said.