Investigators are combing through the writings of a 25-year-old man believed responsible for an explosion that ripped through a Southern California fertility clinic over the weekend.

The person killed in the Saturday explosion outside a fertility clinic in Palm Springs, California, is a 25-year-old from Twentynine Palms, the FBI said Sunday.

The suspect behind the explosion at a Palm Springs, California, fertility clinic, Guy Edward Bartkus, died as a result of the attack. Law enforcement officials said Bartkus made a series of posts on social media,