QUEBEC - Officials at a Quebec jail where three prisoners made a daring escape by helicopter were warned about a possible breakout attempt.

Newly released court documents suggest that Quebec provincial police gave jail officials intelligence on a possible jail break conspiracy involving the three men.

Yves Denis, Denis Lefebvre and Serge Pomerleau escaped from the Orsainville Detention Centre in suburban Quebec City on June 7.

Acknowledgement of the existence of a possible conspiracy is contained in Justice Louis Dionne's judgment dated March 24.

The trio fled after a chopper landed in a courtyard, scooped them up and quickly took off.

The three men are now the subject of an Interpol alert list, which places the Quebec escapees among the world's most wanted fugitives.