The two teenage girls were said to have entered the town barefooted in the early hours of Thursday, a market day.
The attackers were said to be young females.
One of the bombs exploded in Mora, killing one of the girls and wounding at least four people, Babila Akaou, prefect of the Mayo-Sava department said.
Locals killed the second girl before her device detonated, he added, without going into further details.
The sect has frequently used female bombers and children to hit targets.
The two girls, aged between 13 and 18, were said to have entered the town early on market day and were spotted by a watch committee, said Akaou.
"They were heading toward the market. They weren’t wearing shoes … which drew attention," a local identified as Abou said.
He said the girls passed by him around 7 a.m.
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Suicide bombers have launched attacks in Mora, about 30 km (20 miles) from the Nigerian border, several times before.
Similar attacks used to happen on an almost daily basis in Cameroon but the International Crisis Group reported this month that the frequency has fallen since September, leading analysts to believe Boko Haram is weakening there.