PoliticsDeadly clashes between Azerbaijan and Armenia put spotlight on oil and gas supply securityBoth sides claim casualties as violence re-ignites in Nagorno-Karabakh regionA still image from a video released by the Azerbaijan's Defence Ministry shows members of Azeri armed forces firing artillery during clashes between Armenia and Azerbaijan over the territory of Nagorno-Karabakh in an unidentified location, in this still image from footage released 28 September, 2020Photo: DEFENCE MINISTRY OF AZERBAIJAN/REUTERS/SCANPIXKama Mustafayeva