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.

Authorities in Palm Springs are preparing to update the public at a news conference Sunday morning about their investigation into an explosion at a fertility clinic that appeared to have killed the bomber and injured four other people. The explosion damaged office space, but the clinic’s IVF lab and stored embryos were offsite and were not damaged.