A passenger plane has crashed into a two-story building in the densely-populated Nigerian city of Lagos. All those on board are reported to have died in the crash.
The plane was carrying more than 150 passengers, according to the head of the Civil Aviation Authority.
Harold Demuren confirmed that all the passengers on the plane died in Sunday's crash.
The Lagos state government said in a statement that 153 people were on the flight from Abuja to Lagos.
A spokesman for Nigeria's national emergency management agency said more casualties on the ground were likely, but the number was still unknown.
Officials said the crash occurred just outside the airport in Lagos. The plane reportedly hit a furniture shop before slamming into an apartment building.
Nigerian President Goodluck Jonathan has declared three days of national mourning after the crash.
A statement from his office said he had also cancelled all his engagements on Monday and ordered the "fullest possible investigation" into the crash.
Lagos is Nigeria's commercial capital and largest city, with an estimated population of 15 million people.
Dana Air is one of Nigeria's main airlines and has been operating since November 2008. Its website says it flies a fleet of Boeing MD-83 aircraft.
On Saturday, an Allied Air Boeing 727 cargo plane coming from Lagos was involved in a crash at the main airport in the Ghanaian capital, Accra. At least 10 people died when the aircraft overshot the runway and hit a small van full of passengers.
tj/rc (AP, AFP, Reuters)