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

As authorities sift through debris at a Palm Springs fertility clinic, investigators are looking at how bombing suspect Guy Edward Bartkus learned to build a bomb and where he acquired the parts.

Authorities investigating an explosion in Palm Springs, California, that damaged several homes and businesses on North Indian Canyon Drive.