Investigators: Deadly Building Explosion May Have Been Package

ALISO VIEJO, Calif. (AP) – An explosion that rocked a Southern California medical office building on Tuesday, killing a woman and injuring three other people, is being investigated as intentional and investigators believe the blast may have come from a package, a U.S. official told The Associated Press.
The explosion at the office building in Aliso Viejo – about 50 miles south of Los Angeles – blew siding off the walls, exposing insulation and framing.
Authorities had not found