Kwamishina Filipo Grandi, ya fara wannan ziyara ne a yau Litinin da yankin Diffa inda ‘yan Najeriya fiye da 200,000 da suka gudo daga yankin Arewa maso Gabasin kasar suka sami mafaka kusan shekaru uku kanan sakamakon rikicin Boko Haram.
