Armenia will host joint drills with US forces next week, officials in Yerevan said Wednesday -- the latest sign of the ex-Soviet republic's drift from its traditional ally Russia.

The announcement came a day after Moscow dismissed criticism from Armenia that Russian peacekeepers were failing to maintain order over the only route linking Armenia to the breakaway separatist region of Nagorno-Karabakh in Azerbaijan.

The Armenian defence ministry said the Eagle Partner 2023 drills aim to "increase the level of interoperability" between Armenian and US forces in international peacekeeping missions.

They will be held from September 11 to 20 in Armenia's Zar training centre.

The Kremlin responded saying the announcement "raises concerns" and vowed to "thoroughly analyse" the exercises.

Russia and Armenia are at odds over a 2,000-strong Russian peacekeeping contingent responsible for the Lachin corridor, which connects Armenia to Nagorno-Karabakh.

They have been deployed there since 2020 when Russia brokered a ceasefire to end a war between Armenia and Azerbaijan over the mountainous territory.

Armenian Prime Minister Nikol Pashinyan recently said Moscow was either "unable or unwilling" to control the corridor.

His government says Azerbaijan has closed the road and blockaded Nagorno-Karabakh, spurring a humanitarian crisis in Armenian-populated towns.

Marking a major foreign policy shift, Pashinyan also said that Yerevan's longstanding reliance on Russia as its security guarantor was a "strategic mistake".

Pashinyan's wife was in Kyiv on Wednesday to attend a meeting of first ladies and gentlemen and deliver humanitarian aid for the first time since Russia's invasion of Ukraine.

Russian Deputy Foreign Minister Mikhail Galuzin told state news agency TASS that NATO was attempting to draw Armenia "into the sphere of its pernicious influence".

Armenians were "wise and far-sighted enough... not to buy into such provocative" moves, he said.

"We impose nothing on anyone. But, naturally, we draw the attention of our partners to the fact that closer relations with NATO are unlikely to yield any positive results in terms of ensuring their own security," Galuzkin said.

Russia has a permanent military base in Armenia which is part of the Moscow-led Collective Security Treaty Organisation.

The Kremlin said this week that Russia was fulfilling its obligations to Armenia, with Kremlin spokesman Dmitry Peskov saying Russia "is not going anywhere".

Tensions between Baku and Yerevan have escalated sharply in recent months, as both sides accuse the other of cross-border attacks.

The two sides have been unable to reach a lasting peace settlement despite mediation efforts by the European Union, the United States and Russia.