One person aboard a single-engine plane was killed Friday after the aircraft crashed in a West Los Angeles neighborhood, authorities said. The pilot of the Cessna 210 declared an emergency for unknown reasons around 6:10 p.m. shortly after leaving Santa Monica Airport, according to Ian Gregor, a spokesman with the Federal Aviation Administration in its Western-Pacific region. The plane then went down about three miles from the airport in a residential neighborhood in West Los Angeles, a few miles from the University of California, Los Angeles, said Gregor. Overhead video from CNN affiliate KTLA showed firefighters working to douse a fire as most of the plane, including a visible part of its wing, lay in the middle of a road. The aircraft appeared to have hit at least one tree, but not any buildings directly.