More than three million
people are facing a humanitarian crisis in three northern Nigerian
states hit by an Islamist-led insurgency, the government's relief agency
has said.
The conflict has displaced about 250,000 people since January, it added.
President Goodluck Jonathan declared a state of emergency in the three states last year to crush the insurgency.
However, the militant Islamist group Boko Haram has stepped up attacks in recent months.
The group operates mostly in Borno, Yobe and Adamawa, where the state of emergency is in force.
Earlier in a statement, the Nigerian government's National Emergency Management Agency (Nema)
said the "needs of the affected population are increasing by the day
and the support of all is urgently required".
Borno was worst affected, with about 1.3 million people -
most of them women, children and the elderly - in need of aid, Nema
said.
In Adamawa, the number stood at around one million and in Yobe at more than 770,000, it said.
Nigerian Red Cross Society representative Soji Adeniyi said what has happening in the north-east was unprecedented.
"We have never had this kind of displacement caused by
conflicts before in the country,'' he is quoted by Nigeria's
privately-owned This Day newspaper as saying.
Earlier this month, Boko Haram fighters attacked an army barracks in Maiduguri, the capital of Borno state.
Its fighters also looted and
torched several villages and towns in the state after launching attacks
with rocket-propelled grenades and assault rifles.
Last month, the group was accused of killing at least 29 people in an attack on a rural boarding school in Yobe.
Boko Haram has waged an insurgency since 2009 to create a strict Islamic state in northern Nigeria.