I'm not sure I believe this. I'd like to see more evidence. It would be a very strange place to train terrorists. The Greek Cypriots are not an impartial source.
Many Turks feel great sympathy for the Chechens:
http://news.bbc.co.uk/1/hi/world/europe/1223398.stm
Moscow also said the Chechen charities in Turkey finance the rebels, who have been fighting Russian forces for the last three years in the breakaway republic, the Anatolia news agency said.
http://www.theturkishtimes.com/archive/02/11_01/f_russia.html