Teens hand themselves in to police over Sydney fire

Two 13-year-old boys have handed themselves in to police after a fire destroyed a seven-storey heritage building in central Sydney.

The building went up in flames on Tuesday afternoon, requiring about 100 firefighters to extinguish the inferno.

Police believe other teens were involved in the incident and have asked them to come forward.

Fifteen people were sleeping rough in the building at the time of the fire and 13 of them have been accounted for.

However, at least 70 residents have been displaced from the surrounding buildings, with an exclusion zone expected to stay in place for seven days.

Police confirmed the teens who handed themselves in were assisting them with their inquiries.