Eight police vehicles are on the scene of an ongoing incident in Forfar.
Five police cars and three police vans are camped up in Restenneth Drive, close to Pitreuchie Place.
A police spokeswoman said an arrest has been made for a man wanted on warrant.
She added: “Others are in the property. This is a live incident.”
A shocked onlooker wrote on Facebook: “Everybody out watching.”
Another observer wrote: “They’ve got the riot van, the dogs, the shields, the lot. Pepper spray has gone off too.”