Student protesters clashed with police in the Turkish capital Ankara during a demonstration against urban development.
Riot police used smoke grenades and water cannon to disperse the crowds.
The college-goers are angry that municipal authorities plan to build a road across part of their campus at Middle East Technical University, which has one of the largest green spaces in the city.
In May, a peaceful protest against plans to redevelop Gezi Park in Istanbul escalated into a wider show of anger against the government of Prime Minister Recep Tayyip Erdogan.
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