Pitt Street in the Sydney CBD has been closed by police following a man's death.
Emergency services were called to the Sydney Tower just after 2.45pm.
A man is understood to have died at the scene, and the death is not being treated as suspicious.
The area is cordoned off and police remain at the scene.
According to NSW Ambulance, several witnesses are suffering from shock.
If you or someone you know needs assistance, contact Lifeline on 13 11 14.