An announcement from the province is expected today on the extension of the Montreal Metro's blue line.

Radio-Canada sources say the blue line will be extended six kilometres eastward to the borough of Anjou.

The extension could see as many as five new metro stations built beyond the blue line's current eastern terminus of St-Michel.

In June, the agency for transit in the metropolitan area (AMT) sent a request to the provincial government detailing which metro lines needed extending.

Quebec's transport minister, Sylvain Gaudreault, earlier confirmed that the province favoured the eastward extension of the blue line.

Tomorrow's announcement is also expected to touch on a possible future extension of the yellow line past Longueuil.

The mayor of the South Shore borough, Caroline St-Hilaire, has been invited to attend.

The last extension of Montreal's metro system saw three stops in Laval added to its orange line. Announced in 1998, work began on the extension in 2002 and was completed in 2007. The extension cost $800-million, more than five times its projected cost.

The announcement is expected at 10 a.m. Check back with CBC Montreal for more news later this morning.