Armed officers near a vehicle which had been stopped
Armed police were spotted in Winckley Square triggering worry for nearby businesses and residents.
Around 4.30pm on Thursday (27 October) the SWAT teams were seen stopping a vehicle.
A police car with armed officers was also in operation.
It is understood the incident was a training exercise.
A police vehicle with armed officers
Blog Preston asked Lancashire Police for more information and confirmation it was a training incident, but no information was provided.
Read more: College House owners forced to repair Winckley Square building
Behind the armed officers the ongoing work in Winckley Square can be seen, as part of a major restoration project.