KCAL-TV ( http://cbsloc.al/YTelwg) says classes at Holy Angels School in Arcadia are canceled through at least Wednesday.
The station says classes were cancelled after the pastor called Arcadia police to say a member of his family was named in Dorner's online manifesto.
Police say they're making patrols.
Dorner is a former Los Angeles police officer. He's suspected of killing three people in retaliation for his firing.
Information from: KCBS-TV, http://www.cbs2.com/