Do you know more? Email us, message us on Twitter @smh.

A woman is in critical condition in hospital after she was hit by a bus and trapped for two hours on Wednesday afternoon.

The woman, who witnesses said was aged in her 30s, was taken to Royal North Shore Hospital with multiple critical injuries after the incident on Clarence Street about 3.50pm.

Office worker John Preston said he was eating a pie with a colleague when he saw the Sydney Buses vehicle run over the woman as it turned into Clarence Street from Erskine Street.