Armed police have surrounded a house in Stretford after a man armed with a crossbow threatened police and social workers and barricaded himself inside.
Police negotiators are also at the scene on North Lonsdale Street in Gorse Hill.
The stand-off between police and the unnamed man began yesterday evening and has continued through the night.
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Megan Hurley had reportedly been at the concert with her brother Bradley, 21, who remains in hospital after the terror attack.
The events were cancelled on Wednesday in the wake of the Manchester attack to allow police officers to be re-deployed.