Authorities are investigating what appear to be radical views that Guy Edward Bartkus expressed online before the fertility-clinic attack Saturday,

Federal investigators say the man responsible for a suicide bombing outside a fertility clinic in Palm Springs, California, had personal ties to Washington state.

The FBI believes the suspect in the Palm Springs explosion left behind "anti-pro-life" writings before carrying out the attack, officials said.

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.”

The suspect, 25-year-old Guy Edward Bartkus, was killed in the Palm Springs blast, authorities say, and left behind 'anti-pro-life' writings after he tried to livestream the bombing and died