Local officials say up to four bombers blew themselves up in the town of Bodo on the Nigeria-Cameroon border. The town is in an area frequently targeted by Boko Haram militants.
The Reuters news agency cites an official as saying two bombers hit the town’s central market, while others blew themselves up at the town’s main entrance and exit points.
There was no immediate claim of responsibility, but suspicion fell on Boko Haram.
The group has carried out numerous deadly attacks in northern Cameroon since 2013, when the government began cracking down on militants using the region as a base to launch attacks in Nigeria.
Earlier this month, two female suicide bombers attacked a mosque in the town of Kolofata, killing at least 10 other people. Two female suicide bombers blew themselves up in Bodo last month but killed only themselves.
Cameroon is one of five countries taking part in a regional task force set up to fight Boko Haram. The militant group has killed an estimated 20,000 people and forced more than 2 million to flee their homes since launching its insurgency in 2009.
The group says it is fighting to establish a strict Islamic state in Muslim-majority northern Nigeria.