The Azeri defence ministry accused the Armenian soldiers of trying to cross into Azeri territory. Armenia's defence ministry said its soldiers had been carrying out engineering work in the border area of its eastern Gegharkunik region, which neighbours Azerbaijan.
"Necessary measures are being taken to return the captured servicemen," Armenia's defence ministry said.
Armenia earlier this month accused Azerbaijan of sending troops across the border, highlighting the fragility of a Russian-brokered ceasefire that halted six weeks of fighting between ethnic Armenian forces and the Azeri army last year.
That conflict saw Baku drive ethnic Armenian forces out of swathes of territory they had controlled since the 1990s in and around the Nagorno-Karabakh region.
Azerbaijan on Tuesday denied accusations by Armenia that it had fired across the border at Armenian positions, in a shootout in which Armenia said one of its soldiers had been killed.
Follow us !