Helicopter crash Brazil video Helicopter shakes itself to pieces

Rescue helicopter was destroyed on landing in Brazil

A rescue helicopter disintegrated shortly after landing in the Brazilian state of Pará.

Regional Service for Research and Prevention of Aeronautical Accidents are investigating the reasons for the accident, which left four people seriously injured.

An amateur video shows how the helicopter is smashing by parties during the landing.

Authorities believe the helicopter experienced what is known as ground resonance, a condition that occurs when the rotor of the aircraft is working, while the helicopter is down.