SAN RAFAEL (CBS SF) — Two bodies have been discovered inside a San Rafael home Tuesday morning in what appears to be a murder-suicide, according to a police.

San Rafael police Sgt. Lisa Holton said authorities received a 911 call at 8:21 a.m. from a resident on the 700 block of Penny Royal Lane in the Terra Linda neighborhood, saying he had shot his wife and was ready to shoot himself.

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Police responded to the call but were not able to establish contact with the man, and sent a robot into the property.

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The robot was able to spot two bodies and a weapon, and saw no one else in the home. A man was detained as a possible witness.

A shelter-in-place was briefly in effect for the area bordered by Penny Royal, Del Ganado Road, Pine Lane and Las Raposas Road.

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The homicides were the first in San Rafael since 2011, Holton said.