ANKARA (Reuters) - Turkey said on Tuesday that a deal to end more than a month of fighting in Nagorno-Karabakh had secured important gains for its close ally Azerbaijan in the conflict with Armenia. The agreement, signed by Russia, Armenia and Azerbaijan, follows six weeks of heavy fighting and advances by Azeri forces. On Sunday, Azerbaijan proclaimed victory in the enclave’s second-largest city. “The brotherly Azerbaijan has achieved an important gain on the battleground and table. I sincerely congratulate this sacred success,” Turkey’s Foreign Minister Mevlut Cavusoglu said on Twitter. “We will continue to be one nation, one spirit with our Azeri brothers.” Turkey had accused Armenia of occupying Azeri lands and vowed full solidarity with Azerbaijan, with which it has close ethnic Turkic ties.