ADC Airlines Flight 086 crashes into the Lagos Lagoon in Epe, Lagos State, Nigeria, killing all 144 people on board.

ADC Airlines Flight 086 (ADK086) was a Nigerian domestic flight operated by ADC Airlines from Port Harcourt to Lagos. On the afternoon of 7 November 1996, the crew of the Boeing 727-231 operating the flight lost control of the aircraft while avoiding a mid-air collision on approach; the aircraft crashed inverted at a very high speed into a lagoon, killing all 144 passengers and crew on board. The crash remains as the fourth worst plane crash in Nigerian history after Dana Air flight 0992, The 1992 Nigerian Air force C-130 Hercules Crash, and The 1973 Kano Nigerian Airways Boeing 707 Crash.

Lagos Lagoon is a lagoon found in the city of Lagos, southwest Nigeria, the most populous city in Africa. The name Lagos means 'lakes' in Portuguese, therefore Lagos Lagoon is an example of a tautological place name. The lagoon lies between the Atlantic Ocean and Lagos State. It is one of the ten lagoons in Lagos State and the largest in the Gulf of Guinea which spans over 6,000 square kilometers (2,300 sq mi).

Epe is a town and Local Government Area (LGA) in Lagos State, Nigeria located on the north side of the Lekki Lagoon and about 90 km from Ibadan. During the 2006 Census, the population of Epe was approximately 181,409.

Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of 923,769 square kilometres (356,669 sq mi). With a population of more than 230 million, it is the most populous country in Africa, and the world's sixth-most populous country. Nigeria borders Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Nigeria is a federal republic comprising 36 states and the Federal Capital Territory, where its capital, Abuja, is located. The largest city in Nigeria by population is Lagos, one of the largest metropolitan areas in the world and the largest in Africa.