Story highlights 2 female suicide bombers kill 30 in Madagali, local official says

The Nigerian military fought Boko Haram militants for hours in Maiduguri, residents say

A female teenage suicide bomber attacked a checkpoint there, officials said

Kano, Nigeria (CNN) Attacks by suspected Boko Haram militants have left more than 50 people dead and as many as 114 others wounded in the northeastern Nigerian cities of Maiduguri and Madagali in the past 24 hours, according to residents and Nigerian officials.

Three young female suicide bombers detonated explosives -- two of them together at a market in Madagali Monday morning, killing 30 people, a local official said, and one at a checkpoint in Maiduguri, where one person died.

Sunday evening in Maiduguri, Nigerian troops battled armed Boko Haram fighters trying to enter the city, fighting that left at least 21 people dead and 91 wounded, according to Mohammed Kanar, head of National Emergency Management Agency (NEMA).

The Nigerian troops had spotted a group of armed Boko Haram fighters trying to cross a trench to get into the Jiddari Polo area of Maiduguri and opened fire on them, said Babakura Kolo, a vigilante assisting the military in fighting Boko Haram.

That city has been fortified with trenches to prevent infiltration by Boko Haram.

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