Police attended victims of Seoul’s Halloween stampede disaster (Representational image)|Dalgial|CC BY-3.0

Police are investigating the reason behind the Halloween stampede in Seoul, South Korea, which killed 154 and injured 149 people—mostly in their 20s. The cause of the incident is still unknown.

The event, which easily drew 100,000 people to celebrate the festival, was the city’s first Halloween affair without any COVID restrictions in years. Authorities are being questioned regarding the safety measures they undertook. The country began a week of mourning.