Three inmates deemed extremely dangerous by police have escaped from a Canadian jail in a helicopter, the second such daring prison break recently in Quebec.

In March 2013, two inmates were lifted on a hijacked helicopter from a prison north of Montreal. They were both quickly re-arrested, along with the two accomplices.

Police are now asking for the public’s help in tracking down Yves Denis, 35, Denis Lefebvre, 53, and Serge Pomerleau, 49 – all accused of mafia ties – after the Saturday night jailbreak in Quebec province.

“The helicopter landed in a courtyard at the detention centre,” police spokeswoman Ann Mathieu told the French news channel RDI on Sunday.

The helicopter set down at 7.45 pm then took off to the west, she added.

The three escaped prisoners were accused of being the leaders of a drug trafficking network linked to the Hells Angels. They were to appear in court in January 2015 on charges of premeditated murder.

The fugitives were also facing charges of drug trafficking, conspiracy, and other crimes. A trial on those charges got underway on April 8.

The men were arrested in 2010 as part of an operation to dismantle a drug trafficking network in Abitibi-Temiscamingue, in western Quebec.