Poland is investigating the death of one of its citizens who died at a Canadian airport after police used a Taser stun gun on him.
Prosecutors in Robert Dziekanski's former home town of Gliwice in southern Poland want to find out whether Canadian police officers exceeded their authority and unintentionally caused the death.
The 40-year-old arrived at Vancouver airport on October 14.
It was his first flight and he had planned to start a new life with his mother in western Canada.
But Dziekanski, who spoke only Polish, began acting erratically at the airport.
He apparently became upset when he did not see his mother in the secure baggage area which she was not allowed to enter.
Police officers responding to reports of an aggressive man destroying property stunned Dziekanski with a Taser twice before pinning him to the floor.
He was pronounced dead at the scene.
A coroner's inquest also has been called and the police are reviewing their Taser use.