Tactic may be designed to up pressure on Yerevan to permit a route that would enable Azerbaijanis to reach their Nakhchivan exclave via Armenian territory.
The move appears to be part of a steadily increasing effort by Baku to exert control over the road in southern Armenia that passes through pockets of Azerbaijan-controlled territory.
Tehran concerned at how special forces from Turkey linked up with Azerbaijani counterparts.
Behind the scenes with an American negotiator who helped forge a radical new level of US engagement in Central Asia after 9/11.
Baku has been increasingly airing public criticisms of Moscow over the post-war order, which have been exacerbated by the lack of a formal mandate for the Russian peacekeepers in Karabakh.
Most of the countries Eurasianet covers were involved in the airlift. Some even contributed troops during the 20-year war.