A 730-foot tanker carrying more than 10 million gallons of oil products ran onto a reef and was aground for nearly 11 hours before tugboats freed it in a rising tide Thursday, authorities said. There was no immediate sign of a spill.

A pump room of the single-hull Star Connecticut took on 15 feet of water in the accident Tuesday night, but the flooding was controlled and a Coast Guard helicopter lowered pumps to the ship, said Lt. Kent Youel, a Coast Guard spokesman.The ship ran aground a mile south of Barbers Point, about 10 miles west of Honolulu. The Star Connecticut, owned by Texaco, had just left an offshore mooring and went aground about a mile away, Youel said.