BEIJING - ConocoPhillips China, a subsidiary of the US-based oil company ConocoPhillips, said Tuesday it had detected oil rising from the seabed near its Penglai 19-3 oilfield Platform C.

The company spotted the new oil spill on Sunday, and it is watching the area closely to determine the exact location of the leak.

The company has reported three oil spills in the Penglai 19-3 oilfield in China's Bohai Bay, with one from Platform C and two from Platform B.

The oil giant said it had recovered 2,119 barrels of oil-contaminated mud from the seabed near the Platform C so far.

More than 900 employees and 33 vessels had been deployed to clean up the spill, the company said.

The Penglai 19-3 oilfield is China's largest offshore oilfield, with daily production of about 160,000 barrels. ConocoPhillips holds a 49-percent stake in the field, while its Chinese partner, the China National Offshore Oil Corporation, has 51 percent.