KANSAS CITY, Mo. (AP) – Kansas City, Kansas, police say a 10-year-old boy who was killed while riding the world’s tallest water slide died of a neck injury.

Police say Caleb Schwab was one of three passengers riding in a boat Sunday on the Verruckt water slide at Schlitterbahn Waterpark.

According to a police statement, an off-duty officer working at the water park notified dispatch of the accident around 2:30 p.m. Emergency responders arrived to find the boy dead in a pool at the end of the ride.

Police say two women who also were in the boat – but not related to the boy – sustained minor facial injuries and were treated at area hospitals.