A fire destroyed a garage and damaged one half of a duplex Saturday night in Stokes Court in east Petaluma.

The residents of 203 Stokes Court were not home when the fire broke out, said Capt. Kevin Weaver Petaluma Fire Department.

No one was injured, but a cat died in the fire. Smoke and water damaged the other unit in the duplex, at 201 Stokes Court. A grandmother and her four grandchildren evacuated safely.

Officials estimated the fire damage at $150,000. Investigators haven't determined a cause of the fire due to the extent of the damage, but it appears accidental, Battalion Chief Jeff Holden said.

--Dan Taylor