A woman who was seen walking along Deansgate with a knife has been sectioned under the Mental Health Act.
Armed police rushed to the area after witnesses flagged passing officers down and said they saw a woman carrying the weapon.
Officers deployed a Taser during the incident on Thursday morning.
She has since been detained under the Mental Health Act.
A tweet from the Greater Manchester Police City Centre account said: "An update on yesterdays incident where the woman on Deansgate with the knife was arrested.
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"She has now been detained under the mental health act so will hopefully be receiving support & treatment.
"Many thanks to the witnesses who flagged the officers down."
A GMP spokesman said in a statement yesterday: "A 48-year-old woman has been arrested on suspicion of possession of a bladed article."
