A passenger plane crashed into a two-story building in Nigeria's largest city of Lagos today, killing all the passengers on board, an aviation official said. The Lagos state government said in a statement that 153 people were on the flight going from Abuja to Lagos. The plane crashed in a densely populated neighborhood near the airport. A spokesman for Nigeria's national emergency management agency said there were likely more casualties on the ground, but the number was unknown. Several thousand gathered at the site as firefighters tried to put out flames and carry out survivors.