There has been an attempted armed robbery at a jewellers in Huntriss Row.
One witness said that three men, wearing white forensic-style suits and carrying axes, tried to smash the window just after 9am.
Police and fire crews are now at Bond Jewellers next to McDonald's.
It is now thought the suspects did gain access to the shop.
One man, who did not wish to be named, said: "I was in McDonald's and I heard this massive banging.
"I came out and a man ran past me wearing a mask and one of those white disposable suits that scene of crime teams wear.
"He was carrying an axe."