Ankara, Turkey (CNN) -- A peaceful gathering to honor a slain protester turned into chaos Sunday in Ankara as Turkish riot police used water cannons and tear gas to try to disperse rock-throwing demonstrators. In Istanbul, the sound of residents banging pots and pans together echoed down the streets as another face-off between police and anti-government protesters played out. The sound came from the buildings around Taksim Square and the adjacent Gezi Park, which authorities had cleared by force on Saturday. Thousands of demonstrators calling for Prime Minister Recep Tayyip Erdogan's resignation attempted to return to the square and park Sunday, only to be pushed back by police. The neighborhood south of the park was filled with the smell of burning as police swept through the area, firing tear gas at knots of protesters in the streets.
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Pots and pans echo, tear gas wafts over Istanbul streets
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Clashes erupt in Ankara, including at an event to honor a slain protester
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Erdogan supporters cheer for him at an Istanbul rally
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Erdogan remains defiant of protest demands
The protests started at the end of May over the prime minister's plan to turn @placeholder's Gezi Park into a mall.
The protests started at the end of May over the prime minister's plan to turn Istanbul's @placeholder into a mall.