"We understand that this incident may cause concern for the local community and I would like to reassure residents that there is no risk to members of the public.
"The incident has happened inside a property and those involved are believed to have been known to each other.
"Local officers are out and about in the community to offer reassurance and aid the investigation."
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The woman had been at the O2 Academy on Westgate Road with friends when she was attacked on Pink Lane in Newcastle city centre.