At least one person was killed in an explosion Saturday morning near a fertility clinic in Palm Springs, California, that authorities are calling an "intentional act of terrorism."Palm Springs city officials said in a Facebook post that the blast occurred just before 11 a.

Authorities were still working to piece together a motive and build a chronology of events leading up to the attack.

PALM SPRINGS, Calif. (AP) — Officials in California say police and firefighters are responding to an explosion that rocked the city of Palm Springs.