ANKARA — An advisor to Turkish Prime Minister Recep Tayyip Erdogan, has apologized after a photograph emerged online Thursday which appeared to show him kicking a protestor after Tuesday's coal mine disaster in Manisa province."I am deeply sorry for the incident that occurred Wednesday in Soma," Yusuf Yerkel said in a written statement issued Thursday. "I apologize for not being able to restrain myself despite all the provocations, insults and attacks I was subjected to," he added. Yerkel was photographed Wednesday attacking the protester who was already on the ground after being restrained by the police.