ISTANBUL (Reuters) - Turkish President Tayyip Erdogan told Russian President Vladimir Putin in a phone call that the Nagorno-Karabakh ceasefire agreement was the right step towards a lasting solution, the Turkish presidency said on Tuesday. Russian peacekeeping troops deployed to Nagorno-Karabakh on Tuesday under a deal that halted six weeks of fighting between Azeri and ethnic Armenian forces and froze territorial gains by Azerbaijan. Turkey is a close ally of Azerbaijan. Erdogan told Putin that Turkey would set up a centre to observe the ceasefire along with Russia, in a location “in the lands liberated from Armenian occupation”, determined by Azerbaijan.