The wall was placed in accordance with international rules outside the security zone at 199 meters, according to the country's infrastructure minister in a statement. However, its significance for the crash will be investigated, it says.
The concrete wall has been criticized by several experts who believe it worsened the outcome of the accident, which is the deadliest in South Korea's history. According to the experts, constructions at airports should be designed to give way.
The accident could have ended significantly better if that concrete barrier hadn't been there, says John Cox, chairman of the aviation safety company Safety Operating Systems.
In total, 179 people died in the crash in Muan in southern South Korea. Two survived.
