10/09/2014 05:06 EDT | Updated 12/09/2014 05:59 EST

Charges laid against 13 more Montreal municipal employees after city hall protest

MONTREAL - Charges have been laid against 13 Montreal city employees — including 11 firefighters — following a rampage during a municipal council meeting in August.

The charges include illegal assembly, mischief and assault.

A total of 57 workers are now facing criminal charges in the Aug. 18 incident where protesters burst into city hall and forced politicians to flee as demonstrators threw documents and other objects from desks.

Of those, 44 were arraigned a week ago.

Six firefighters have already been dismissed for taking part in the protest over proposed provincial government changes to public-sector pension plans.

Under the changes, workers would contribute a higher percentage to their plans.

The Montreal firefighters union called Thursday for a boycott of the world police and firefighter games to be held in Montreal in 2017.

The event usually draws about 10,000 participants from around the world.