Luis Mata(ELKO, Nev.) — Authorities in Nevada are continuing to investigate a medical plane’s fiery Friday night crash into a parking lot.

All four on board, including a heart patient and the plane’s crew, were killed.

The American Medflight plane, headed for a hospital in Utah, plummeted moments after takeoff in Elko, Nevada, and exploded into flames upon impact.

“We are devastated by this event and wish we had answers to the many questions being asked at this time,” said a statement from American Medflight.

Police in Elko said witness reports indicated the crash was due to mechanical failure. According to police, the pilot likely saved other lives by avoiding crashing into a nearby apartment building.

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