LOS ANGELES --
Authorities confirm several fires in Griffith Park over the last three weeks were deliberately set.Investigators also believe the fires may be the work of a single arsonist.
Five fires broke out Saturday, just minutes apart. In all, there have been about seven since July 28.
Investigators say all the fires have one thing in common: they were set by the roadside.
Officials are encouraging park regulars to report any suspicious activity.
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