The person killed in the Saturday explosion outside a fertility clinic in Palm Springs, California, is a 25-year-old from Twentynine Palms, the FBI said Sunday.

Bartkus has been named as a suspect in the bombing outside a Palm Springs fertility clinic, two law enforcement sources familiar with the investigation told KCAL News. He also allegedly stated in writings and recordings that he was a “pro-mortalist” — or against bringing people into the world against their will, the sources added.