Nigeria air crash: 'People in Lagos want answers'
Nigerians have begun three days of mourning after a passenger plane with about 150 people on board crashed into buildings in Nigeria's main city of Lagos.
Nigeria's Civil Aviation Authority said there were no survivors on board the Dana Air plane. It is unclear how many people on the ground may have died.
The BBC's Will Ross in Lagos said that the crash is the latest in a series of air disasters in Nigeria, suggesting there are "serious problems" within the industry.