Turkish Foreign Minister Mevlut Cavusoglu on Tuesday called for the world to back Azerbaijan in the conflict during his visit to Azerbaijan.
Iranian state media quoted President Hassan Rouhani as warning in televised remarks that "we must be attentive that the war between Armenia and Azerbaijan does not become a regional war".
Azerbaijan said its foreign minister, Jeyhun Bayramov, would be in Geneva on Thursday when U.S., French and Russian representatives meet to discuss the crisis. Nagorno-Karabakh lies inside Azerbaijan but has been under the control of ethnic Armenian forces backed by Armenia for more than a quarter-century.
The Azeri and Armenian leaders have also been at odds over their conditions for halting fighting that began on September 27. Nagorno-Karabakh officials said that civilian infrastructure and a few residential buildings in Stepanakert have been hit with missiles and drones. "Nagorno-Karabakh is our land".
Azerbaijan says Azeri cities outside the conflict zone have been struck, taking the fighting closer to territory from which pipelines carry Azeri gas and oil to Europe.
He added: "If Armenia is scared of the drones that Azerbaijan is using it should stop its occupation".
Expressing concern about the raised conflict between Azerbaijan and Armenia, he added, "Continuation of the recent tensions is a threat to peace, stability and the coexistence of the regional countries and undermines all the made collective efforts for securing worldwide peace and security".
Peace efforts in the Nagorno-Karabakh conflict, mediated by the Organization for Security and Cooperation in Europe Minsk Group, comprised of the United States, France and Russian Federation, collapsed in 2010.
His enthusiastic backing of Azerbaijan in the recent fighting is widely seen as part of a plan to expand Turkey's influence in the Caucasus.
Furthermore, Istanbul Azerbaijan Cultural Home Association Chairman, Hikmet Elp said that the PKK aims to settle in the Nagorno-Karabakh region and that the Yerevan administration is trying to change the demography of the area by transferring the terrorists and Armenians in Lebanon to the region.
"Without Turkey's active engagement this war would have not begun".
On October 3, the Turkish bureau of the USA news channel CNN Turk published footage that claimed the PKK terrorists were fighting alongside the Armenian ASALA terrorist organization and Armenia's Army in ongoing battles in the Karabakh region. Both have dismissed such accusations in the past.
They include descendants of victims and survivors of the Armenian genocide carried out by Ottoman Turks for several years beginning in 1915.