Big Island police are warning against the dangers of car surfing, where people ride on the roof of a moving car or pickup truck.

At least five incidents of car surfing have occurred in the Kailua, Kona, area since late October, according to Sgt. Nancy Haitsuka.

In one case, a neighborhood watch group reported that two teenage girls held onto luggage racks atop a sport-utility vehicle while a 17-year-old girl drove slowly. No one was injured and no charges were filed.

Haitsuka said police also heard a report of a group of unidentified teenage boys car surfing while speeding.

The U.S. Centers for Disease Control and Prevention said there were 58 car-surfing deaths and 41 injuries reported in newspapers nationwide from 1990 to 2008.