A man has been arrested following a threat to Tauranga's Work and Income New Zealand office, which forced the branch into lockdown today.

The threat is the second this week against staff of a Government agency.

The offender has been charged with threatening language and remanded in custody to appear in court today or tomorrow.

On Tuesday, staff at the Grey St branch of ACC were threatened by a disgruntled client. Police were called and the office was shut down to public until the man could be located and spoken to by police.

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A police spokeswoman confirmed today's incident involved a verbal threat to staff at the Durham St WINZ office.

''We take all incidents such as this very seriously and are responding appropriately,'' she said.

Police were called to the incident at 10.18am.

That was the only information available at this time, the spokeswoman said.