Dubai: The sound of a horn in the wee hours of the morning was the tell-tale sign ... a couple having sex in a car have been jailed.

A lawyer's son heard the horn around 3.15am and on investigating, discovered the couple. His father called police, who arrested the British man, 36, and the woman, 30 from Jumeirah.

The couple told police they had alcohol in a pub and were then spending time together. The woman denied having sex and said they were cuddling. She accidentally bumped into the horn, while they were on the driver's seat. Medical reports proved they had sex.

The Dubai Court of First Instance fined them Dh2,000 each, sentenced them to a month and they will be deported after serving their terms.