Armenia confirms the capture which Azerbaijan Defense Ministry says occurred when the troops “attempted to cross the border and place mines” on supply routes leading to Azerbaijani positions.
The exchange was facilitated by Russian peacekeepers who have been deployed to Nagorno-Karabakh for five years under the peace deal.
The rival Caucasus nations have been locked in some of the fiercest clashes over Karabakh after it was occupied by Armenians in the 1990s after the collapse of the Soviet Union.
Azerbaijan and Armenia are accusing one another of firing directly into each other's territory and reject pressure to hold peace talks.
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