Rioters threw stones and fireworks, and 22 policemen were injured, Istanbul governor Avni Mutlu announced.
BBC: Istanbul march clashes mar May Day in Turkey
"We are expecting a problematic May 1, " said Istanbul Governor Huseyin Avni Mutlu told broadcaster CNNTurk.
CNN: May Day protesters flood streets of Europe
Benny Avni scolded the dog, which became fiercer and looked nearly ready to pounce.
NEWYORKER: Waiting
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