BREAKING: Someone Has Blown Up A Fertility Clinic In Southern Cali With A Car Bomb

The person believed responsible for an attack targeting a Southern California fertility clinic Saturday posted rambling online writings before an explosion that investigators are treating as an act of terrorism, according to a law enforcement official.

The suspect, who died in the explosion that tore through the clinic and rattled the upscale California city of Palm Springs, also attempted to record video or stream the attack, said the official, who was not authorized to discuss details of the attack and spoke on condition of anonymity to The Associated Press.

“Make no mistake: This is an intentional act of terrorism,” Akil Davis, the head of the FBI’s Los Angeles field office, told an evening news conference.

Authorities were still working to piece together a motive and build a chronology of events leading up to the attack. Though the FBI did not say how it had determined the explosion was terrorism, the writings left behind, in which the suspect communicated a belief that the world should not be populated, appear to shed light on the person’s state of mind and help explain investigators’ thesis that the attack was targeted and intentional.