A reporter for the Toronto Sun has tweeted that councillors voted 39 to just three in favour of reducing Mayor Rob Ford's powers.
Ford himself was one of the three to vote against the measure.
BREAKING City council votes 39 to 3 to take away Mayor Rob Ford's power to hire & fire deputy mayor and exec committee members #TOpoli
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The prime minister's announcement came as international leaders gather in Paris on the second anniversary of the climate change plan.