BERKELEY (KPIX 5) — Cat owners in Berkeley are being warned to keep their pets inside because of coyotes.

A sign has been posted after at least three cats were found dead in the Northbrae neighborhood in the last few weeks. Neighbors there blame coyotes.

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One woman on Sonoma Avenue thinks she heard an attack on Labor Day. She said it sounded like 2 cats fighting but later discovered cat remains on the sidewalk.

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Berkeley Animal Services says coyote attacks have actually been going on for about four months.

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Signs have been posted, advising people to keep their pets inside at night.