Responding to a question on his bilateral meetings in Brussels, Mukherjee said terrorism was a subject that figured in his talks and was widely "condemned".
"You know all European countries are signatory to the United Nations resolutions and during our bilateral talks, they all condemned terrorism," he said.
The President will be in Turkey till October 7 to attend a host of events. He is going to the country on the invitation of his Turkish counterpart.
This is the third visit to Turkey by an Indian President, with the earlier ones being in 1993 and 1998.
India and Turkey share the common interest of ensuring peace and political stability in Afghanistan and Central Asia, officials said.
