The car bombing outside a California fertility clinic that killed one person and injured four others appears to have been driven by anti-natalist ideology, according to two senior law enforcement officials briefed on the incident.

Guy Edward Bartkus, 25, of Twentynine Palms, California, was identified by the FBI in the apparent car bomb detonation that damaged the American Reproductive Centers fertility clinic on Saturday.

A 25-year-old man believed to be responsible for an explosion that ripped through a Palm Springs, California, fertility clinic left behind “anti-pro-life” writings before carrying out the attack.