Fulani herdsmen have killed at least five villagers in northern Nigeria's Kaduna state in the latest violence over grazing rights, police said on Wednesday, but local media put the toll higher.
"There was an attack on several communities in the state on Tuesday. Five people lost their lives and we are investigating the incident," state police spokesman Aliyu Usman told AFP.
He said police had deployed to restore peace.
"Our men are on ground. The place is now calm."
Local media said at least 11 people were killed when Fulani herders invaded Ungwan Anjo, Akwaa and Gida Biyu villages in Jema'a local government area of the state, while several houses and farmlands were destroyed.
The media also said 15 people were killed in another attack at the weekend in Demsa council area of Adamawa state, some 250 kilometres (155 miles) from Kaduna.
Officials in Adamawa were not immediately available for comment.
Clashes over grazing rights are common between Muslim Fulani herders and largely Christian farmers in Nigeria, particularly in the religiously mixed central states.
Last week, one person was killed, one missing and two injured in an attack in Benue state where hundreds were reportedly killed in February.
President Muhammadu Buhari, a northern Muslim, has proposed the creation of grazing land to prevent further clashes in a country that is battling a seven-year Boko Haram insurgency in the northeast.