UN chief Ban Ki-moon condemned twin suicide bombings in Cameroon - the first by Boko Haram terrorist group in the country - and called for better cooperation to fight the militants.

UN chief Ban Ki-moon condemned twin suicide bombings in Cameroon, the first by Boko Haram terrorist group in the country - and called for better cooperation to fight the militants.

At least 11 people were killed when two women blew themselves up in the border town of Fotokol in northern Cameroon.

Ban "strongly condemned the twin suicide bombings," his spokesman said.

He "encourages them [local authorities] to further strengthen their cooperation in addressing the threat posed by Boko Haram, as well as ensuring strict compliance with international humanitarian and human rights law," the statement added.

Ban said he was "encouraged" by measures already taken by Cameroon to fight against the militants and welcomed its efforts to host refugees fleeing the crisis.