A tunnel collapse in Los Angeles has trapped at least 15 people, prompting a large-scale emergency response. The Los Angeles Fire Department (LAFD) has deployed significant resources, including all of its Urban Search and Rescue (USAR) teams, to the scene. Rescue efforts are currently underway as authorities assess the stability of the collapsed structure and work to safely extract those trapped inside. The cause of the tunnel collapse is currently unknown and under investigation. Further updates will be provided as the situation develops.