Six people were killed Monday night when a small plane crashed onto a golf course in Scottsdale, Arizona, authorities said early Tuesday.

According to CNN, the Piper PA-24 had just taken off from nearby Scottsdale Airport when it crashed onto the TPC Scottsdale Champions Course and erupted into flames, police said.

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No people were on the ground at the time of the crash, authorities said.

The National Transportation Safety Board is investigating the incident, CNN reported.