An Indian-origin couple has been harassed in Canada by a 'racist' white man who yelled that 'go back to your country' and threatened to 'kill' their children, prompting police to investigate it as a hate crime.

The incident happened on Sunday when the Indian and the 47-year-old Dale Robertson got into a scuffle over a parking lot at the Walmart Supercentre in Hamilton. The argument started after the couple, who were not identified, tried to back into a parking spot and apparently got in the way of Robertson, who then gets into his silver truck as the Indian man tries to talk to him, CBC reported.