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.m. local time at North Indian Canyon Drive, near East Tachevah Drive, a stretch that has several healthcare facilities. Four other people were injured in the explosion, none of which are believed to be staff members of the clinic, city officials said. In a statement, Palm Springs Police Chief Andy Mills disclosed that one person was killed in a vehicle explosion that appeared to be an intentional act of violence. The victim has not yet been identified, Mills said.