Four dead and one missing after military aircraft ‘carrying nuclear material’ crashes in California

A military aircraft carrying nuclear material has crashed in California, leaving at least four people dead.

The plane crashed in Imperial County near Highway 78, preliminary reports indicate.

Officials believe at least five people were aboard at the time of the crash. Four individuals have been confirmed dead. One person remains unaccounted for.

A rescue mission and investigation are underway. 

This is developing story. More to come.