US Co-Chair of the OSCE Minsk Group James Warlick has said the escalation at the line of contact is unacceptable.

Warlick took to Twitter to comment on the situation at the line of contact between the armed forces of Nagorno Karabakh and Azerbaijan over the past day.

The mediator uploaded the picture of a 120mm mortar released earlier by the with the following message attached:

“This is a 120mm mortar reportedly used in the Nagorno-Karabakh conflict. Such escalation is unacceptable.”

This is a 120mm mortar reportedly used in the Nagorno- conflict. Such escalation in unacceptable.

— James Warlick (@AmbJamesWarlick)