SOUTH KINGSTOWN — A tractor-trailer making a delivery to Chen’s Restaurant in Wakefield hit a utility pole yesterday, and power lines fell across a car, trapping two people for about an hour, a co-owner of the restaurant said.

Leo Lau said about six parties were in his restaurant when the power failed. An Agar foods delivery truck maneuvering around the building hit a pole toward the rear of the lot, which snapped, causing a transformer to pop and leaving power lines draped across a car.

The police said the call came at 12:32 p.m. Traffic was tied up briefly at 60 Old Tower Hill Rd. as the delivery truck was removed and National Grid trucks arrived. No one was injured, the police said.

A woman, 40, and a girl, 11, were waiting in the car, Lau said, while a member of their party picked up food.

Lau said this is the third time the pole has been hit, twice by an Agar truck. He couldn’t accept the delivery because it required refrigeration. Gas is used for cooking but the exhaust fans run on electricity, so he closed temporarily, hoping to reopen for the evening. But a new pole was being installed at 5 p.m., and crews were still working to restore power as of 8:30 last night.

Chris Mabbott from Ransom Environmental Consultants said the pole held three transformers, each of which holds from 7 to 11 gallons of oil, in this case vegetable-based. A crew from Clean Harbors used absorbent pads to remove the oil. Mabbott said he searched about a half-mile radius for oil slicks and left oil-absorbent booms, which he described as giant white cotton snakes, wherever he found a stream or drain.

dnaylor@projo.com