Hamilton police have closed off part the city’s CBD around Centre Place.
Two young women were on the roof of Centre Place above the Lido Cinema, about four storeys up.
One is now in police custody, but the other was still up there at 1.20pm.
Bryce Street in the Barton Street block is closed, as is a section of Victoria Street. At least three police cars, ambulances and two fire engines are in attendance.
Northern Fire Communications shift manager Colin Underdown said someone phoned to report two young women on the roof of the shopping mall.
Fire services were liaising with police to try to coax the second of the pair off the roof from the Bryce St side of the building.