At Least 16 Dead in Clashes Between Armenia and Azerbaijan

A still image from a video released by the Armenian Defense Ministry shows what is said to be Azerbaijani armored vehicles, one of which is destroyed by Armenian armed forces in the breakaway region of Nagorno-Karabakh, in this still image from footage released on Sept. 27, 2020. Defense Ministry of Armenia/Handout via Reuters

YEREVAN/BAKU—At least 16 military and several civilians were killed on Sunday in the heaviest clashes between Armenia and Azerbaijan since 2016, reigniting concern about stability in the South Caucasus, a corridor for pipelines carrying oil and gas to world markets.

The clashes between the two former Soviet republics, which fought a war in the 1990s, were the latest flare-up of a long-running conflict over Nagorno-Karabakh, a breakaway region that is inside Azerbaijan but is run by ethnic Armenians.