- Azerbaijani tanks on Wednesday shelled positions in the breakaway Nagorno Karabakh region for the first time in more than 20 years, the rebel defence ministry said, as Armenia arrested a former army officer accused of spying for its archfoe.
Armenia and Azerbaijan fought a bloody conflict over the disputed Nagorny Karabakh territory in the 1990s before reaching a tenuous ceasefire in 1994 but they have not signed a peace deal and clashes erupt regularly.
The ethnic Armenian enclave in Azerbaijan enjoys the backing of the Armenian authorities.
"For the first time since the ceasefire, Azerbaijan has used tanks on the Karabakh frontline," killing one soldier, the rebel defence ministry said in a statement.
"Some 1,500 shots were fired from tanks and grenade-launchers," the statement added.
Azerbaijan offered a different version of events, saying Armenia had fired mortar rounds at settlements in Azerbaijan.