The Ministry of Social Development's Thames office has been in lockdown for almost four hours after an incident this morning.
A police spokesperson confirmed police are looking for a person after receiving a report of person making verbal threats at the centre at 11.50am this morning.
A sign on the Pollen St centre's door reads "Lockdown in place due to a security incident".
Police said the workplace chose to stay in voluntary lockdown.
Ministry of Social Development Waikato regional commissioner Te Rehia Papesch confirmed the service centre was in lockdown.