LAGOS, Nigeria — A Nigerian airline spokesman says the dead body of an apparent stowaway was found inside the wheel well of an aircraft that originated in South Africa.

Arik Air spokesman Banji Ola tells The Associated Press that workers found the body Monday after the Airbus A300 returned from Johannesburg. Ola described the incident as a "security breach" and said he had no other information Tuesday.

A Nigerian federal aviation spokesman declined to immediately comment.

Arik Air is considered Nigeria's top commercial airline.

In August, the U.S. Federal Aviation Administration granted Nigeria its top air-safety rating. That allows Nigerian airlines to fly directly to the U.S. However, porous airport security remains a concern in Africa's most populous nation.