Nigerian troops and police are hunting for the remnants of Boko Haram, an Islamist group that went on a killing spree in the country's north.
At least 30 people were killed in fresh clashes between security forces and the group the northern state of Yobe on Wednesday, a police source said.
Wednesday's violence came after the army shelled a mosque and the home of Mohammed Yusuf, the group's alleged leader, in Maiduguri, the capital of Borno state.
Before leaving on a trip to Brazil on Tuesday, [President] Yar'Adua said that the situation was "under control".
But fresh fighting broke out in Maiduguri following the assault on the home of Yusuf.
Pray, pray, pray.