A man has been arrested over the alleged serious sexual assault of an 18-year-old woman in the centre of Aberdeen .
The incident happened at the top deck of the St Nicholas Centre, Schoolhill, at around 3.45am on Saturday.
Earlier officers locked down the Roof Garden of the shopping centre.
A 20-year-old man has since been arrested in connection with the incident, Police Scotland said.
Detective Inspector Jennifer Cordiner said: "We are following a positive line of inquiry into what appears to be a targeted assault on a vulnerable female within the city centre."
