MOSCOW (REUTERS) - The Armenian defence ministry has declared a no-fly zone in Armenia and Nagorno-Karabakh, except for military aircraft, Russia's Interfax news agency reported on Thursday (Nov 12).
Thousands of protesters on Wednesday gathered in Armenia's capital, Yerevan, demanding Prime Minister Nikol Pashinyan step down over a ceasefire that secured territorial advances for Azerbaijan in Nagorno-Karabakh.
The ceasefire, announced on Tuesday, ended six weeks of fighting - the worst in the mountain enclave for decades - and has been celebrated as a victory in Azerbaijan.
Among the protesters, some chanted "Nikol is a traitor" while others shouted:"Nikol, leave."
Mr Pashinyan has said he had no choice but to sign the agreement to prevent further territorial losses. He said he was taking personal responsibility for the setbacks, but rejected calls to step down.
The Armenian Parliament announced it would hold a special session on Wednesday evening to discuss the calls for his resignation, but it was not held as the parliament, dominated by Mr Pashinyan's supporters, failed to have a quorum.
Opposition leaders called on protesters outside the parliament to leave and promised to share their future plans on Thursday.
The ceasefire halted military action in and around Nagorno-Karabakh, an enclave internationally recognised as part of Azerbaijan but populated by ethnic Armenians. Under the agreement, 2,000 Russian peacekeeping troops are being deployed to the region.
Since the early 1990s, ethnic Armenians had held military control over all of Nagorno-Karabakh and substantial swaths of Azeri territory surrounding it. They have now lost much of the enclave itself as well as the surrounding territory.
Seventeen political parties called Wednesday's protest to step up demands for Mr Pashinyan to quit. A number of protesters were arrested, including Mr Gagik Tsarukyan, leader of the opposition Prosperous Armenia party, according to a Facebook post by a member of his party. Prosperous Armenia is the second biggest faction in parliament.
Russian peacekeepers - who are due to stay in the region for five years - started leaving Russia on Tuesday and are now controlling the Lachin corridor, a mountain pass linking Armenia and Nagorno-Karabakh, the Russian army said.
For Russia, which has a defence pact with Armenia and a military base there, securing the ceasefire deal sent a signal that it is still the main arbiter in the energy-producing South Caucasus, which it sees as its own backyard.
Turkey also flexed its muscles during the conflict, providing diplomatic support and arms supplies for Azerbaijan. It was not involved in mediating the ceasefire deal and has not contributed any peacekeepers.
But Turkey and Russia signed an agreement establishing a joint centre to monitor the ceasefire in Nagorno-Karabakh on Wednesday and will work together there, Turkish President Recep Tayyip Erdogan said.