One video posted on a messaging app shows what appears to be two Armenians in military uniforms being captured by troops from Azerbaijan.
A second video seemingly shows the same Armenians being shot with their hands behind their backs.
Armenian authorities have identified the men as Benik Hakobyan, 73, and 25-year-old Yuri Adamyan. Azerbaijan has dismissed the videos as fake.
Europe’s top human rights watchdog, the Council of Europe, has said it has received the video and will investigate all alleged human rights abuses.
By cross-referencing a still from the video before the men were shot with a satellite view of the town and footage from a local TV report, it is possible to identify the exact location as the park next to Mkrtchyan Street (39°30’53.4″N 47°02’01.8″E).
Bellingcat identified the same locations and time periods for both videos and confirmed that helmets and rifles seen on the soldiers matched those used at least in some instances by Azerbaijani servicemen.
The BBC spoke to a former British military intelligence officer who agreed to talk on condition of anonymity due to security reasons. They said: “These are real bullets, this is a real killing. This is genuine, and I don’t see any reason to assume it’s staged.“
Brain matter could be seen coming out of a gunshot wound, the officer said.