A 25-year-old man the FBI believes was responsible for an explosion that ripped through a Southern California fertility clinic left behind “anti-pro-life” writings before carrying out an attack investigators called terrorism,

The man authorities allege set off a deadly car explosion outside a California fertility clinic left behind chilling online writings

Authorities are investigating what appear to be radical views that Guy Edward Bartkus expressed online in the months before Saturday's attack. Here is what we know.

A 25-year-old man believed to be responsible for an explosion that ripped through a Palm Springs, California, fertility clinic left behind “anti-pro-life” writings before carrying out the attack.

One person was killed and at least four other people were injured after a vehicle exploded outside of a fertility clinic in Palm Springs, California.

At a press conference, Akil Davis, FBI assistant director in charge of the Los Angeles field office, said the bombing was “an intentional act of terrorism.”

Here's the latest on the suspect in "one of the largest bombing investigations we've had in Southern California," according to the FBI.

An explosion outside a Palm Springs, Calif., fertility clinic late Saturday morning killed one person, injured four others and sent debris flying for blocks in all directions in the city about 100 miles east of Los Angeles. The prime suspect in the bombing is also who authorities believe was the sole fatality in the blast: 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.