Residents of the remote Canadian town of La Loche, having softened frozen cemetery ground with bonfires, prepared to bury their loved ones as Prime Minister Justin Trudeau arrived on Friday at the site of Canada's worst mass shooting in a decade.

Trudeau's visit comes a week after a shooter killed four people and wounded seven at a home and high school, and a day before funerals were to begin in the aboriginal Saskatchewan town.

"It was an extremely touching visit for me," Trudeau said, in a soft voice choked with emotion. "We met an extraordinarily resilient community of people here in La Loche."