The U.S. military is conducting a search for a Marine who is reported missing off the coast of southern California during a training exercise. Multiple agencies are involved in the response, according to officials cited by several outlets. Crews begin searching early on Thursday, shortly after midnight, in the area off the California coast near San Diego, where the Marine was last reported during the exercise. The reports describe the effort as an interagency operation, drawing on military resources to locate the service member and determine what happened during the training. While details about the specific circumstances of the training exercise, the location’s exact coordinates, and the Marine’s condition are not provided in the available summaries, all accounts indicate that the search is ongoing and that authorities coordinate across agencies as they carry out the operation. The search effort remains focused on finding the missing Marine off the San Diego-area coastline.