A San Diego man died at an electronic music festival northwest of San Bernardino.
John Hoang Dinh Vo, 22, attended the "Beyond Wonderland" festival at the Glen Helen Amphitheater in Devore on March 20.
At about 10:15 p.m., he suffered what appeared to be a seizure and went into cardiac arrest, according the San Bernardino County coroner's office.
Emergency crews took him to the hospital, but he was pronounced dead about an hour later.
Vo's autopsy has been performed, but the cause of death is still listed as pending.
