Whanganui District Council says a security guard’s error led to four people being locked in the Durie Hill Tower at night.
The Whanganui Fire Brigade and police were called to the tower on Tuesday at 11.43pm after four people became trapped past its closing time.
Council parks and property manager Tania Henare said following an investigation they found that, after being delayed on another job, a security guard had failed to walk the tower as agreed before locking the door.
“We have addressed this with Armourguard, who manage this task,” Henare said.
It was “an unusual event” and they were not aware of any recent incidents in which someone had been locked in the tower, she said.