Six youths aged between 17 and 21 have been arrested for trespassing.
On Jan 30, at about 7.53pm, the police received a call that the group had been found on the rooftop of Shaw Towers on 100 Beach Road.
Marks were found on the secured door leading to the roof.
The six were arrested. Investigations are ongoing.
Police said that members of the public should not trespass into private premises and restricted places such as the building rooftops.