A person was detained Monday night for possibly setting a small fire in the Ingleside Terrace neighborhood.

The fire, which was reported about 8 p.m. at 591 Arch St., was small in nature, but suspicious, police said.

A person was climbing into a neighboring backyard when they were caught by the homeowner, police said. Cops arrived and detained the person. Police said they are looking at the possibility of arson.

Police did not release a description of the suspect, but they are still investigating the incident.

No one was injured in the one-alarm fire.

akoskey@sfexaminer.com