Azerbaijan has launched "anti-terrorist" operations in areas of its Nagorno-Karabakh region under ethnic-Armenian control, threatening to carry on "until the end". Tensions in the South Caucasus have been high for months around the breakaway enclave, recognised internationally as part of Azerbaijan. Azerbaijan and Armenia last went to war three years ago. Baku made clear the latest offensive would stop only with a surrender. "Illegal Armenian military formations" would have to raise the white flag, hand over all weapons and dissolve "the illegal regime", the Azerbaijani presidency said in a statement . Azerbaijan and Armenia first went to war in the early 1990s after the fall of the Soviet Union. Then in 2020 Azerbaijan recaptured areas in and around Nagorno-Karabakh before a truce was agreed and monitored by Russian peacekeepers.