More than 20 people were killed after gunmen attacked several villages in Talata Mafara in Nigeria's northern Zamfara state on Wednesday.

Nasiru Lauwali, a local councilor representing the Sauna district, told AFP that 21 people had been killed.

Meanwhile, Sauna district secretary Alhaji Shehu Garba said 23 people had been killed across five villages.

Three others wounded by gunfire were transferred to a hospital in neighboring Sokoto state.

Bandits remain a threat in Nigeria