The main container terminal operators at the Port of Montreal has served notice of a complete shutdown of their operations for one day in response to violent incidents involving striking dockers. The shut down began this morning at 7:00 am. Normal operations are to resume Saturday, August 1st at 7:00 am. Violence is said to have broken out, reflecting rising tensions at the port. The announcement follows an announcement from the Montreal Longshore Union CUPE 375 earlier this week that a second, 24-hour strike would start immediately after the four-day strike they had earlier this week. The 24-hour strike began at 05:59 today and will end at 05:59 on Saturday. Terminals were planned to be closed for all activity during this separate 24-hour strike.