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 declared a “blast zone” and cleared residents in the Twentynine Palms neighborhood over concerns that bomb-making materials could be inside a home.

Guy Edward Bartkus was identified as the suspect accused in the bombing targeting a Palm Springs, CA, fertility clinic, and authorities are investigating a possible manifesto, according to the FBI. The bombing occurred on May 17,

Authorities called the attack terrorism and said Guy Edward Bartkus left behind nihilistic writings that indicated views against procreation, an idea known as anti-natalism.

The suspected bomber of a California fertility clinic appears to have declared “war against pro-lifers” in a smattering of online writings believed to be his. A webpage with statements expressing hatred of religion and human life is part of an FBI probe into Guy Edward Bartkus,

Bartkus was identified as the key suspect by the FBI on Sunday, after his body was discovered near a burned-out vehicle outside the clinic. He had reportedly attempted to livestream the explosion, with a camera found set up on a tripod nearby, although no footage was uploaded online.

Sitting here with my kids, knowing that this guy was 50 feet away — a bomb of that magnitude could have destroyed our house… was pretty insane,” a neighbor said.

Authorities are investigating what appear to be radical views the Palm Springs bombing suspect expressed online in the months before Saturday’s attack. Here is what we know.