About 100 residents of the 30-storey Opal Tower apartment building at Sydney Olympic Park have been evacuated after reports of ‘cracking noises’ from residents and passers-by.
An emergency operation is underway and police have closed the nearby train station and several roads.
The alarm was raised about 2:45pm.
Residents told police they heard cracking noises throughout the morning and emergency services are now testing the structural integrity of the building.
One resident told Nine News he heard a ‘big bang’ like something ‘snapped’ inside the building.
Residents have not yet been told when they will be allowed back in the building – if at all.
NSW Fire and Rescue said it had specialist equipment at the scene to monitor any movement and police have set up an exclusion zone amid fears the building has serous structural damage.
The doors of the building were jammed and the police had to break through to help residents out.
Police were at the scene carrying heavy-duty equipment to knock down doors.
One Opal Tower resident was told there were cracks on the 12th or 13th floor.