Police released photos of the three men on social media and appealed to the public for help, but warned anyone who spotted them not to approach and immediately contact police.
Audrey-Anne Bilodeau, another police spokeswoman, said Saturday that police were working with surrounding airports and Quebec’s Valcartier military base to help track down the helicopter.
The Orsainville Detention Centre, about 10 kilometers (six miles) from the center of Quebec City, can hold up to 710 offenders.
In March of last year, a helicopter pilot was forced at gunpoint to pluck two inmates from the St-Jerome prison on a quiet Sunday afternoon. Two inmates climbed up a rope ladder into the hovering helicopter and fled.
Police caught the two escapees and the two suspects who hijacked the helicopter within a few hours of the escape.