EU Enlargement Commissioner Stefan Fuele was speaking ahead of talks on Turkey's ambition to join the EU.
In response, Turkish PM Recep Tayyip Erdogan said similar protests in Europe would be dealt with more harshly.
Turkey has seen a week of civil unrest sparked by a police crackdown on a local protest over an Istanbul park.
Mr Fuele and Mr Erdogan were both speaking at a conference in Istanbul on Turkey's relations with the EU.
The EU enlargement commissioner said the EU had no intention of giving up on Turkey's accession, but Turkey had to maintain values of freedom and fundamental rights.
He urged a "swift and transparent" investigation and those responsible should be held to account.
"Peaceful demonstrations constitute a legitimate way for groups to express their views in a democratic society," he said.
"Excessive use of force by police against these demonstrations has no place in such a democracy". » | Friday, June 07, 2013
