FBI investigating California fertility clinic explosion as an act of terrorism

Debris covers the ground near the site of an explosion (ABC7 Los Angeles via AP)

The person believed responsible for an attack targeting a Southern California fertility clinic 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 Saturday 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 authorised to discuss details of the attack and spoke on condition of anonymity to The Associated Press.