The fires were all in the Warm Springs District between Hackamore Lane and Mayten Way. Most were set on Sunday and Monday mornings between midnight and 5 a.m., police said.
The damage has mainly been limited to garbage, small bushes, dumpsters and trees.
Fremont police have increased patrol checks in the area, police said.
Anyone with information about these incidents has been asked to contact Fremont Police Detective T. Macdonald at (510) 790-6900 or firstname.lastname@example.org.
Anonymous tips can be sent to 888777 by text messaging “TIP FREMONTPD” followed by a message, or online at https://local.nixle.com/tip/alert/5733596.
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