HOLLYWOOD (CBS) — Los Angeles County Supervisor Zev Yaroslavsky says the county will offer a $25,000 reward for information leading to the arrest of the person or persons responsible for the series of fires set overnight in Hollywood and West Hollywood.

This is in addition to $25,000 offered by the city of Los Angeles and $10,000 offered by federal authorities, bringing the total reward offered to $60,000.

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There were at least 21 arson fires reported in the past 24 hours, said officials. Seventeen fires were within city limits, and 4 more were in LA County.

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At a 4 p.m. press conference also attended by Mayor Antonio Villaraigosa, Los Angeles Fire Department Chief Brian Cummings, Sheriff Lee Baca, LAPD Commander Blake Chow and West Hollywood Mayor John Duran, an angry Yaroslavsky raised a few eyebrows when he vowed to  “catch the s.o.b’s” responsible for setting the fires.

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