The EU on Tuesday urged Turkey to make a "proportionate" response to "terrorism" in order not to endanger a faltering peace process with Kurdish rebels.

EU enlargement commissioner Johannes Hahn told Turkish EU Minister Volkan Bozkir that Ankara has "the right to react to any form of terrorism," according to an EU statement.

He added: "The response, however, must be proportionate, targeted and by no means endanger the democratic political dialogue."