Russia's Prosecutor General Yuri Chayka will arrive in Armenia September 21, Sona Truzyan, the Spokesperson of the RA Office of Prosecutor General told a PanARMENIAN.Net reporter. In her words, Yuri Chayka will arrive in Yerevan by invitation of his Armenian counterpart Aghvan Hovsepyan. A sitting of the Russian-Armenian joint board and signing of an agreement on cooperation is scheduled during the visit.