Not much to add. From the Guardian:
An apparent bomb explosion has injured at least 20 people in the Turkish town of Cesme, according to reports today.
The explosion occurred in a rubbish bin - where Kurdish rebels, Islamic and leftist militants are known to plant bombs, NTV television said. There were no claims of responsibility for the attack.
It's probably a domestic group, not international terrorism. I suppose that makes it a little better. Damn, but I need to go back to undergrad and really learn about the world...