Two people have been sent to hospital, one of them in serious condition, following the crash of a small plane on a grass airstrip about an hour northeast of Calgary on Tuesday.

The Transportation Safety Board of Canada (TSB) confirms the small plane was a Vans RV9A aircraft , described by witnesses as a home-built two-seater plane.

It was on flight from Wetaskiwin Regional Airport to a private airstrip in Linden, Alta ., when the crash happened.

TSB spokesperson Hugo Fontaine said the plane was landing around 4:45 p.m., and was on its approach to the runway when the landing gear came into contact with a wire fence.

A witness tells Global News the plane then flipped upside down, onto its roof.

The witness said the two people on board were both experienced aviators in their 80s.

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