Former Transportation Secretary Pete Buttigieg was the target of an anonymous report that police determined was false.
A report of shots fired at Blair High School in Pasadena sparked fear among students and parents Friday morning, but police said it appeared to be a hoax.
College campuses across America are experiencing an epidemic of hoax calls about bogus shootings and other emergencies following the shooting death of Charlie Kirk.
Since swatting emerged as a national problem, both federal and local laws have been used to fight it.
A series of swatting calls across Los Angeles and San Bernardino County have triggered multiple lockdowns, including at Claremont McKenna College and Loma Linda University Children's Hospital.
A report of a possible shooter at Claremont McKenna College was determined by police to be a hoax.