TOKYO (AP) _ A South Korean cargo ship smashed into rocks Thursday near southwestern Japan, spilling about 1,800 gallons of fuel oil into the water, the Japanese coast guard said.

Some of the oil was floating toward Shikoku Island, where about 2 1/2 miles of beach had been fouled by foam likely caused by oil, said Maritime Safety Agency spokesman Shingo Nakamura.

Oil was still leaking from the ship's fuel tanks, which contained about 27,300 gallons at the time of the accident, and it was unclear when the ship could be salvaged and brought into port, Nakamura said.

No injuries were reported among the 15 crew members of the 2,830-ton Chun Il _ 12 Koreans, two Filipinos and a Chinese.

The ship, bound for Yokohama, Japan, from Pusan, South Korea, struck partially submerged rocks about a mile off the southwestern coast of Shikoku, 425 miles west of Tokyo.

The agency sent 23 ships to put up oil fences and clean up the spill with chemicals, but temporarily halted the operation at nightfall, Nakamura said. The cleanup will continue Friday.