At least 13 people have died after a Ford Expedition SUV was involved in a collision with a semi-truck in Imperial County, California, located just miles from the U.S.-Mexico border, officials said. Imperial Fire Department Battalion Chief Juan Rodelo told Fox 11 in Los Angeles that a mass casualty crash in Holtville occurred. A number of people have been injured, officials said. Twelve people were found dead when first responders reached the highway, which winds through fields in the agricultural southeastern corner of California. Another person died at a hospital, California Highway Patrol Chief Omar Watson said. A Ford Expedition typically seats eight people legally. The CHP did not immediately know why so many occupants had been crammed into the SUV. “Obviously, that vehicle is not meant for that many people,” Watson said. “It’s unfortunate that that many people were put into that vehicle because there’s not enough safety constraints …