"It has become known that 12 square meters [129 sq ft] of a tower that belongs to the fortified wall of the Haghpat monastic complex … has partially collapsed," the Rescue Service said in a statement.
No casualties were reported, the service said, adding there was a risk that the rest of the ancient tower might crumble. The area was cordoned off.
The Armenian Apostolic Church owns the Haghpat monastery, while its maintenance is the responsibility of the Tumanian Regional Municipal Authority under an agreement.