Cameroonian troops killed 39 Boko Haram fighters in clashes with the Islamists, who were carrying out 3 raids on Cameroon’s territory, the defense ministry said on Sunday, October 26.

Friday’s fighting in the far north of Cameroon near Nigeria also claimed 4 civilian lives, the ministry said in a statement sent to the Agence France-Presse (AFP).

Boko Haram rebels, who have been waging attacks in northern Nigeria and who kidnapped more than 200 school girls there in April, frequently cross into neighbouring Cameroon.

Their latest attack targeted the village of Glawi, “killing 4 Nigerian refugees and wounding one Cameroonian, before being pushed back by defense forces which pursued them until the borders,” the ministry said, adding that a dozen militants were killed by troops.

Another two groups of Boko Haram Islamists entered Cameroon at around the same time, but were “immediately intercepted and neutralised by our defense forces who destroyed three 4×4 vehicles equipped with machine guns, killing 27 assailants,” said the ministry statement.

The toll issued by the ministry has not been confirmed by independent sources. There were also no details on any casualties suffered by the army.

The Cameroonian army regularly issues updates on the number of Boko Haram fighters it has killed.

Last week, it said it killed 107 Islamists during fighting that also saw eight Cameroonian soldiers lose thier lives.

President Paul Biya has vowed to “totally wipe out” the Islamist group, after 27 Chinese and Cameroonian hostages kidnapped in May and July on Cameroon’s territory by suspected Boko Haram Islamists were released.

Cameroon shares a border of more than 2,000 kilometers (1,200 miles) with Nigeria, where Boko Haram has been waging a bloody insurgency since 2009 in which 10,000 people have died.