A clash between Chad’s army and Boko Haram on a Lake Chad island has killed four soldiers and 33 Islamists, a military spokesman said Friday.

“Boko Haram elements on Wednesday attacked our forces in Choua,” military spokesman Colonel Azem Bermandoa Agouna told AFP, referring to a Lake Chad island in Chadian territory.

“The Chadian army violently repelled the attack. We killed 33 Boko Haram members and recovered several light arms and anti-tank grenades. We regret the loss of four soldiers and also recorded four wounded,” the Chadian military spokesman said.