MARCUS HOOK, Pa. (AP) _ A Panamanian tanker ran around in the Delaware River and spilled almost 10,000 barrels of crude oil, creating a slick that covered 2 to 3 miles of the river, officials said Sunday.

The 761-foot Grand Eagle lost about 435,000 gallons of crude oil when it ran aground near Claymont, Del., about 11:30 p.m. Saturday, the U.S. Coast Guard said.

The ship managed to reach its destination, the Sun Oil Co. refinery at Marcus Hook, Sun spokesman David Hackney said. The ship was moored at the refinery and was not leaking any more oil, according to Coast Guard Lt. Robert Mitchell.

The refinery sent its crews out to help clean up the spill, Hackney said.

The cause of the accident was under investigation, Mitchell said, and the Coast Guard established a ''safety zone'' at the site of the spill. No vessels would be allowed in the zone without permission of the captain of the port, he said.