Police are trying to negotiate with a man who has barricaded himself inside a house and may have doused it in petrol.
The fire service is on standby after the man suggested he may have fuel inside the terraced house.
A police spokesman said officers responded to calls about concerns for the welfare of someone in the Windhill area at 9.50am today.
“Negotiations are continuing by the police trained negotiator with a local man who has barricaded himself inside the property,” he added.
A fire service spokesman said firefighters were assisting the police, but had no further details.
An eye-witness said there was a heavy police presence at Park Road, which is closed off at the junction with Carr Lane.