Tunis, Jan 25, SPA -- Ould Zidan, the Prime Minister of Mauritania, arrived in Tunis last night on an official two-day visit. He will lead his country's delegation to the 55th session of the Tunisian-Mauritanian joint Commission. A Mauritanian official said the 15th session will witness the signing of series of agreements relating to joint investments and trade exchange between Mauritania and Tunisia.--SPA www.spa.gov.sa/520927