A police negotiator has persuaded a woman to leave the roof of Centre Place in Hamilton.
A short while before this breakthrough an ambulance and fire truck were moved further away from the building to reduce spectators.
A second person - who appears to be a male police officer - had joined the police negotiator on the building a short while before.
An area of Hamilton had been closed after police received reports of two people on the roof of Centre Place.
The incident happened on the Bryce St side of the shopping area, a police spokeswoman confirmed.