Today Armenian Foreign Minister Vardan Oskanian met in London with OSCE Minsk Group Co-Chairs Yuri Merzlyakov (Russia), Steven Mann (US) and Bernard Fassier (France), RA MFA press service reported. During the meeting the parties discussed the Prague process. The purpose of the meeting was the preparation of the possible meeting of the Armenian and Azerbaijani Presidents envisaged in mid-May. Tonight the Armenian FM will return to Yerevan.