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.

Anti-natalist ideology appears to be the motive behind Saturday’s deadly bombing in Palm Springs, two senior law enforcement officials told NBC News.

Police Chief Andy Mills told News Channel 3's Peter Daut that other people could potentially face charges if investigators learn they had some prior knowledge about the Palm Springs bomb explosion or the suspect's activities.

The FBI believes the 25-year-old 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.

A loud explosion-like sound was heard in California's Palm Springs on Saturday. Locals posted photos and videos of what appeared to be a human carcass. Footage showed windows shattered on several buildings.