US Co-Chair of the OSCE MG for settlement of the Nagorno Karabakh conflict Matthew Bryza will visit Stepanakert on a two-day working visit July 29, NKR MFA Press Service reports referring to the Office of Personal Representative of the OSCE Chairman-in-Office. During the visit to Stepanakert NKR President Arkady Ghoukassian will receive the US mediator, reports Novosti-Armenia.