The California Department of Justice has opened an investigation into the oil spill that occurred off the coast of Huntington Beach earlier this month, reports NPR. California Attorney General Rob Bonta announced recently that authorities from his office will work to determine the cause of the spill and what, if anything, could have been done to prevent or minimize the incident. Investigators for the U.S. Coast Guard so far have determined that the underwater oil pipeline was likely struck by a large ship’s anchor. But this hit likely happened several months to even a year before it was discovered that tens of thousands of gallons of oil had spilled into the ocean. That discovery took place in early October. Amplify Energy has been identified as the company responsible for the pipeline leak.