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BROOMFIELD, Colo. — Two people were killed when a small aircraft crashed in the Anthem Ranch area of Broomfield on Friday, North Metro Fire Rescue said.

The crash happened just before noon in a park area near Las Brisas Drive and Anthem Ranch Road south of Highway 7 in north Broomfield, about a half-mile from the runway at Erie Municipal Airport.

The names, ages and gender of the people on board the plane were not released.

The National Transportation Safety Board has been brought in for the investigation.

The NTSB said the plane was a home-built Mustang II model. The agency said the plane did not have a flight plan, but none was required.

The NTSB could not say the time or place from which the plane departed.

There was no known communication with air traffic control. Witnesses reported the plane flying low and fast before the crash.