Nigerian troops have opened fire and burned buildings in the north-eastern city of Maiduguri, reportedly killing 30 civilians.
The shootings came after a bomb blast targeting the army had injured two soldiers.
But army spokesman Lt Col Sagir Musa told the BBC that soldiers had not shot any civilians.
Maiduguri has been under siege from the militant Islamist group Boko Haram, which wants Sharia law in Nigeria.
On Sunday, the army said it killed 30 Boko Haram members in another north-eastern city, Damaturu.
Eyewitnesses in Maiduguri said soldiers began to indiscriminately open fire on residents and set fire to homes and businesses.
<<Print>>