Authorities , 23 , search 35 locations in Riverside County in probe of attacks targeting police . Police hope sweep will lead to information about those responsible for the attacks . A motive is still not known . Four death trap - style attacks against Hemet Gang Task Force have occurred since 2014 . Attacks could be gang - related , but motive unclear , a police source says .
Authorities , 23 , search 35 locations in Riverside County in probe of attacks targeting police . Police hope sweep will lead to information about those responsible for the attacks . Four death trap - style attacks against Hemet Gang Task Force have occurred since 2014 . Attacks could be gang - related , but motive unclear , a police source says .