Metropolitan Superintendent Anthony Wagambie Jr confirmed the incident happened between 10am and 12 midday.
He said the three suspects had held up the staff in the administration office and made off with less than K3,500 in cash and an unspecified amount of cheques.
Wagambie Jr said after holding up the staff and getting hold of the takings, the suspects escaped in a waiting vehicle where they abandoned it close by and went on foot at Papuan Compound.
