Nigerian Red Cross officials say they've found 25 corpses after a massive flood washed through northeast Nigeria.

Officials said Sunday they recovered the corpses from the Benue River in Adamawa state. Red Cross state secretary Abubakar Ahmad said he believed the corpses may have come from neighboring Cameroon as no one in the area could immediately identify the dead.

Ahmad said there could be more dead after the flooding as others are still missing. Officials previously recovered at least 45 bodies from the flooding, which they blamed on officials in Cameroon opening up a dam. Cameroon warned Nigeria before relieving pressure on the overwhelmed dam.

Nigeria is experiencing its annual rainy season. Flooding recently killed at least 68 people in Plateau state in central Nigeria.