Bartkus is believed to be the person who detonated a bomb at the Palm Springs American Reproductive Center, which offers services like IVF, because he was aligned with the pro-mortalist and anti-natalist movements—the idea that humans should not continue to procreate.

The community, r/Efilism, is devoted to a philosophy mentioned on a website published before Saturday's bomb blast.

The FBI believes the suspect in the Palm Springs explosion left behind "anti-pro-life" writings before carrying out the attack, officials said.

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.