A demonstrator lies on the ground after being hit by a police water cannon during an anti-government rally in Valparaiso, Chile, May 21 2010.IVAN ALVARADO
Police have added a water cannon to their arsenal as they step up security ahead of this week's G20 summit in Toronto.
Provincial police Const. Michelle Murphy of the Integrated Security Unit says the water projection system will be used to control large crowds if there are riots.
Activists have promised to be out in force to protest the two-day summit of world leaders that starts Friday.
Const. Murphy says the security plan is moving ahead as planned and officers are being put in place.
Toronto's police chief has said 5,100 officers have been assigned to keep the city safe as the weekend summit nears.
There are ads in local newspapers Monday explaining the security zone and advising people how to deal with it.
There was also a visible increase in the number of uniformed police officers on downtown streets over the weekend.
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