Medical center explosion that killed woman may have been intentional

Medical center explosion that killed woman may have been intentional  CBS News 1 Killed in Explosion at Office Building in California  New York Times 1 Dead, 3 Hurt In Suspicious Explosion At Southern California Office Complex  NPR Deadly Explosion at Aliso Viejo Medical Building Was 'Intentional Detonation'  NBC Southern California Woman killed in 'suspicious' explosion at Aliso Viejo office building  Los Angeles TimesFull coverage