A hazmat team is responding to an oil sheen off the coast of Huntington Beach Friday morning that resulted from a boat that sank in the area, officials said.

A boat apparently sank sometime Thursday and spilled 300 gallons of diesel according to Orange County Supervisor Katrina Foley’s office. The supervisor specified the incident was not an oil spill.

The U.S. Coast Guard is overseeing the incident, and beachgoers were asked to stay out of the ocean between Beach Boulevard and Seapoint, the Huntington Beach Fire Department said in a tweet.

That area of the shore was reopened to the public around 2 p.m. as the Coast Guard continued to monitor the situation, officials said.

huntington beach oil sheen
Sky5 captured a capsized boat where the oil sheen originated from. (KTLA)

Aerial video from Sky5 showed some areas of darker water off the Huntington Beach Pier. Sky5 also captured the capsized boat in the vicinity.