Published: Jun 26, 2010 7:51 PM EDT
Updated: Jun 26, 2010 4:52 PM EDT

TORONTO (AP) - Toronto police say they'll be watching splinter groups within the larger G-20 protest today in case they might be prone to violence.
      
The largest demonstration, sponsored by labor unions, is planned for today. Police have made 32 arrests and laid 51 charges since June 18. Some 19,000 law enforcement officers from all over Canada are providing security.
      
But, so far, authorities say they are pleased that the protests are proceeding "peacefully" compared to what they've seen at previous summits. Hundreds of protesters moved through Toronto's streets Friday, but police in riot gear blocked them from getting near the summit security zone.