In the Tuesday phone talks, the Iranian top diplomat advised the two parties to exercise restraint and start negotiations to peacefully settle their conflicts.
He also expressed Tehran’s preparedness to help end the ongoing tensions.
The Nagorno-Karabakh conflict, which has recently escalated once again, is a territorial and ethnic conflict between Armenia and the Azerbaijan Republic over the disputed region of Nagorno-Karabakh and seven surrounding districts. The conflict escalated into a full-scale war in the early 1990s.
A ceasefire signed in 1994 provided for two decades of relative stability. A four-day escalation in April 2016 became the deadliest ceasefire violation to date.