Euractiv.com with Reuters Est. 2min 13-09-2022 The southern part of Nagorno-Karabakh following the 2020 war. [Radio Free Europe/Radio Liberty] Euractiv is part of the Trust Project >>> Print Email Facebook Twitter LinkedIn WhatsApp Telegram Clashes erupted between Azerbaijani and Armenian troops, Russian news agencies reported early on Tuesday (13 September), in a resumption of decades-old hostilities linked to the disputed territory of Nagorno-Karabakh. Azerbaijan, which re-established full control over the territory in a six-week conflict in 2020, acknowledged casualties among its forces. Armenia made no mention of losses, but said clashes persisted overnight. ⛔️OFFICIAL⛔️ – #Armenia's Defence Ministry spokesperson officially announces that at 00:05 local time, #Azerbaijan started attacking their border positions with heavy artillery around the towns of Sotk, Goris and Jermuk. UAV's also reportedly used. (1) 1.https://t.co/fneLfgwQXR pic.twitter.com/A4ONdzq1cc — Nagorno Karabakh Observer (@NKobserver) September 12, 2022 The Yerevan government said it would invoke a cooperation agreement with Russia and appeal to a Russia-led security bloc, the Collective Security Treaty Organisation (CSTO), as well as the United Nations Security Council, Interfax reported. CSTO foresees Russia to offer military assistance if the territory of Armenia proper is attacked. Each side blamed the other for the outbreak in fighting. “Several positions, shelters and reinforced points of the Azerbaijan armed forces … came under intense shelling from weapons of various calibres, including mortars, by units of the Armenian army,” the agencies quoted a statement by Azerbaijan’s Defence Ministry as saying. “As a result, there are losses in personnel and damage to military infrastructure.” Azerbaijani statements said Armenian forces had been engaged in intelligence activity on its border, moved weapons into the area and on Monday night had conducted mining operations. It said its actions were “strictly local in nature aimed at military targets.” Armenia’s Defence Ministry said: “Intensive shooting is continuing – started as a result of a large-scale provocation by the Azerbaijani side. Armenia’s armed forces have launched a proportionate response.” Conflict first broke out in the late 1980s when both sides were under Soviet rule and Armenian forces captured swathes of territory near Nagorno-Karabakh – long recognised internationally as Azerbaijan’s territory, but with a large Armenian population. Azerbaijan regained those territories in the 2020 fighting, which ended with a Russian-brokered truce and thousands of residents returning to homes from which they had fled. The leaders of both countries have since met several times to hammer out a treaty intended to establish a lasting peace. The last such meeting was hosted by Council President Charles Michel on 31 August. Armenia, Azerbaijan leaders to hold EU-mediated talks The leaders of ex-Soviet rivals Armenia and Azerbaijan agreed to meet in Brussels next Wednesday (31 August) for EU-mediated talks, Armenia’s government said. (Edited by Georgi Gotev) Read more with Euractiv Ukraine calls for more Western arms after Russia pullbackUkraine's President Volodymyr Zelenskiy on Monday (12 September) called on the West to speed up deliveries of weapons systems as Ukrainian troops move to consolidate control over a large swath of northeastern territory seized back from Russia.