Armenia and Azerbaijan allege attacks outside Nagorno-Karabakh

Turkey denies claim it shot down Armenian jet, as UN announces emergency talks

• Explainer: why is there fighting and what are the implications?

Fighting between Armenia and Azerbaijan threatened to escalate as both sides accused each other of targeting border areas outside Nagorno-Karabakh and Armenian officials claimed Turkey was deploying fighter jets in the conflict.

Armenia's defence ministry said one of its Sukhoi Su-25 jets was shot down on Tuesday morning by a Turkish F-16 that had taken off from the Ganja airbase in Azerbaijan. Unfortunately, the pilot died heroically," the ministry said.