Islamic State’s West Africa affiliate on Tuesday claimed responsibility for an attack on an army base in Niger last week that killed at least 89 Nigerien soldiers, according to a statement translated by the SITE Intelligence Group.

Islamic State’s West Africa Province (ISWAP) said in the statement that its fighters killed 100 soldiers and wounded an unspecified number of others in the raid last Thursday on the base in the town of Chinagodrar, near the Malian border.