US Foreign Minister Antony Blinken was optimistic at the end of the talks. The two Caucasus countries clashed in two wars in the early 1990s and in 2020 for control of Nagorno-Karabakh.
Tensions, already high, redoubled when Baku announced on 23 April that it had installed a first road checkpoint at the entrance to the Lachin corridor. The only axis linking Armenia to the separatist enclave has been subject to a months-long blockade that has caused shortages and power cuts.