NORTH LAS VEGAS, Nev. (AP) — The crash of a small plane near Las Vegas killed four people and started a fire that was threatening homes.

Federal Aviation Administration spokesman Ian Gregor said the single-engine plane went down Saturday afternoon in a forested area. It then burst into flames and touched off a wildfire.

Fire officials say the blaze quickly climbed steep terrain in a recreational area and is threatening about 40 homes. Authorities recommended that residents evacuate. Federal authorities are investigating the crash.