Armenia and Azerbaijan long at odds over Nagorno-Karabakh
Clashes endanger oil and gas supplies from the region
Each side blames the other over latest clashes
US calls for halt to hostilities
Yerevan/Baku | At least 16 military members and several civilians were killed on Sunday in the heaviest clashes between Armenia and Azerbaijan since 2016, re-igniting 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.
