SANTEE, Calif. (AP) - Authorities say three people were killed when a home-built airplane crashed in a San Diego County nature preserve.

Sheriff's Lt. Scott Amos says the single-engine plane went down Saturday morning within Sycamore Canyon Open Space Preserve near Santee. Amos says there were three people on board and all were killed.

Federal Aviation Administration spokesman Ian Gregor says the four-seat Lancair IV-P had departed from San Diego's Montgomery Field en route to Deer Valley Airport in Phoenix. The FAA withheld the aircraft's tail number until next of kin have been notified.

The FAA and the National Transportation Safety Board are investigating.

The Lancair web site says the 25-foot IV-P is one of a series of aircraft kits that are no longer in production.

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