Thames-Coromandel CIB Detective Sergeant Martyn Hughes said the four staff members managed to escape before the men tied the doors shut. Three staff got out relatively quickly but one staff member remained inside a bit longer.
"At this point in time we do not believe the man made any threats toward this staff member who was able to escape before the arrival of police,'' he said.
Officers armed with guns arrived, untied the doors and arrested the man.
Ms Pye witnessed the rampage from her workplace.
Initially she thought the ruckus was the recycling being collected but soon realised the gravity of the situation.
"It sounded like someone smashing glass bottles into the bin,'' she said.
BNZ external relations manager Emily Davies praised the actions of the men who locked the attacker inside the store and described them as heroes.
"The offender caused a significant amount of damage. No staff or customers were targeted or injured,'' she said. "Our main concern is the health and welfare of our staff.''
Ms Davies said no customers were in the store and staff were shaken but uninjured.
The store was likely to remain closed today.
A 53-year-old local man will appear in Hamilton District Court today charged with attempted aggravated robbery and intentional damage.