snas possible break in the case of the arson's in the l.a. area. there have been 50 fires in the last three days. cnn's casey wian has the latest for us. >> when we arrived at the command center just before 1:00 in the morning an arson investigators told us everything was quiet. that quickly changed. just after 1 a.m. monday, los angeles fire crews and arson investigators responded to nearly a dozen car fires in the san fernando valley hollywood and west hollywood. on day four of l.a.'s arson spree, the number of cars set on fire exceeded 50. some of the blazes spread to structures, including a apartments, residents were terrified.