At least 18 people were slightly injured Friday as unusually large hailstones fell in the southern Spanish coastal resort of Marbella, officials said, according to dpa. Some of the hailstones were the size of tennis balls, residents said. Radio reports put the number of injured at 30 people, including several children. The hailstorm also damaged hundreds of cars. The hailstones were exceptionally large, though hailstorms were not unusual in coastal areas at this time of the year, meteorologist Jesus Riesco said. The hailstorm followed heavy rains which flooded roads and caused traffic jams. Rains caused flooding also in other parts of the Andalusia region, inundating basements and shops and severing road and rail links in the Granada and Jaen provinces.