UN Secretary-General António Guterres Urges Sides in Nagorno Karabakh to De-escalate Tensions, Ensure Freedom, Security of Movement in Lachin corridor. The following statement was issued today by the Spokesman for UN Secretary-General António Guterres: The Secretary-General is following with concern the ongoing developments around the Lachin corridor. The Secretary-General urges the sides to de-escalate tensions and to ensure freedom and security of movement along the corridor, in line with the previously reached agreements. The Secretary-General reiterates his support to the ongoing mediation efforts in the region.