Despite years of attempted mediation between them, Armenia and Azerbaijan have yet to reach a peace agreement.
Azerbaijan has been blockading the enclave of Nagorno-Karabakh for months, in what many Armenians and some US politicians call the beginnings of a new genocide.
Azerbaijan's defense ministry said Azerbaijani troops stopped a convoy it suspected of carrying weapons from the region's main town to outlying areas.
Azerbaijan has implemented a blockade on the only road connecting Nagorno-Karabakh with Armenia; which has rapidly become a humanitarian crisis.