“There were three suicide attacks at the market, there are many casualties,” the source, speaking on condition of anonymity, told AFP.
The attacks took place in Bodo on the border with Nigeria, home to Boko Haram fighters.
Since the group first brought its bloody campaign across the border into Cameroon’s extreme north in 2013, almost 1,200 people have been killed in the region, Cameroon government spokesman Issa Chiroma Bakary said early this month.
Up until 2013, when Cameroon bolstered its military presence along the border with Nigeria, Boko Haram fighters had slipped back and forth across the frontier, often using the remote north of Cameroon as a rear base and acquiring arms, vehicles and supplies there.
Cameroon since has ordered its army to go on the offensive, joining troops from Nigeria, Niger, Chad and Benin in a regional coalition against Boko Haram.
The region was attacked just last week, when four worshippers were killed in a suicide bombing at a village mosque.
The Nigeria-based jihadists have killed at least 17,000 people and made more than 2.6 million others homeless since their six-year campaign began.