Suspected Boko Haram Islamist fighters from Nigeria kidnapped around 80 people, many of them children, and killed three others on Sunday in a cross-border attack on villages in northern Cameroon, army and government officials said.

The group, which has killed thousands and kidnapped hundreds in its bid to carve out an Islamic state in northern Nigeria, has also targeted Cameroon and Niger over the past year as it seeks to expand its zone of operations.

Sunday's kidnappings, among the largest abductions on Cameroonian soil, came as neighboring Chad deployed troops to support Cameroon's forces in the area.