Bari mu leka a Mauritania inda a ranar Alhamis fada ya barke tsakanin yansanda da wasu yan hankoron kare hakkin al’umma a birnin Nouakchott, a jajibirin kamala yakin neman zaben raba gardama da za’a gudanar kan yin sauye-sauye ga kudin tsarin mulkin kasar