Cameroon's police say that at least 20 bodies have been found in the regional capital of Maroua after two young girls apparently blew themselves up in a busy marketplace and a popular neighborhood.
A source close to the local government told the AFP that the girls blew themselves up as they were begging in the central market.
Police officer Eric Bambue said the toll could rise as the search for bodies continues.
Cameroon, which borders Nigeria and has contributed troops to the multinational force fighting the Boko Haram rebels there, has been attacked twice before by suicide bombers.
Boko Haram's six-year-old insurgency in Nigeria to establish an independent state that follows its own interpretation of Islamic law has spilled over into neighboring countries.
According to Cameroonian businessman Ousmaila Toukour, hundreds more people were wounded.
Wire services
Relief workers say they sometimes pose as Red Cross volunteers to avoid possible attack from insurgents
March aims to build support for Cameroon's fight against Boko Haram, discourage young people from joining armed group
Hundreds of women were rescued by Nigerian troops in late April; some had been held by the armed group for a year
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