The U.S. Coast Guard and State officials are investigating an oil spill into the Richmond Wharf that occurred early Thursday.

California officials said on Thursday that they have concluded the spill response at Chevron's Richmond Wharf port facility in the state but noted that an investigation will continue.

Chevron is working with state officials to clean up a diesel product spill that was reported off the Richmond wharf Thursday.

Chevron Corporation has stated its plans to increase its exploration holdings in African oil producers such as Nigeria and Angola. It promised to increase its exploration due to the anticipated ...