An 18-year-old woman remains near a suspicious package inside a house on Sydney's lower north shore, police say.
Bomb technicians and negotiators are with the teenager in the house as a major operation involving the bomb squad, rescue squad and police continues at Mosman, Assistant Commissioner Mark Murdoch told reporters on Wednesday.
Police found the teenager alone in the house on Burrawong Avenue after emergency services were called at 2.30pm (4.30pm NZT) on Wednesday.
Mr Murdoch would not confirm reports the bomb is attached to the young woman, but said she remained in the house near the device.
"There's a device in the house in the vicinity of the young woman. That device is still being examined as we speak," Mr Murdoch said.