CASTRO VALLEY (CBS SF) — A man was found dead inside a home in Castro Valley and investigators are treating the case as a homicide.

The Alameda County Sheriff’s Office says a person of interest has been detained following Monday’s discovery of a body at a home on the 19900 block of San Miguel Ave.

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Deputies had responded to a welfare check for a resident at the home at about 3 p.m. after friends expressed concerned he had not been heard from, the sheriff’s office said.

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As deputies were checking the perimeter of the home, an adult male was seen laying on the floor. Deputies entered the home and found the man dead with injuries consistent with a homicide, the sheriff’s office said.

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The identities of the victim and the person detained were not released. No other information was immediately available.