Three young men were arrested here Saturday for allegedly stealing cars for joyriding. The arrests followed shortly after an Arab expatriate reported to the police that a car carrying three men hit his vehicle from behind and as he got down to check the damages to the car, the three hopped into the car and fled. They left their car behind which also turned out to be a stolen one. After getting the descriptions of the three men, police patrols spotted a suspect in his teens joyriding near a southern residential plan, and put him under surveillance and identified a house where the three later gathered. The police arrested the trio and have referred them to the Al