The United States is concerned about recent developments on the international border between Armenia and Azerbaijan, including the detention of several Armenian soldiers by Azerbaijani troops, the US Embassy in Baku tweeted.

"The United States is concerned about recent events on the border between Armenia and Azerbaijan, including the detention of several Armenian soldiers by Azerbaijani servicemen. We call on both sides to resolve this incident peacefully. We call on Azerbaijan to immediately release all detainees," the statement reads.

"The United States calls on Azerbaijan to redeploy its troops to the positions they held on May 11, as well as return to substantive negotiations as soon as possible under the auspices of the OSCE Minsk Group co-chairs to achieve a long-term political settlement of the Nagorno-Karabakh conflict," the official website of the embassy said.