The senior officer, Amy Scott, was conducting routine duties nearby when she was directed to head to Westfield shopping centre following reports a man was using a “massive” knife to stab shoppers.

Within minutes, the officer was inside the centre and began chasing the offender.

“This all happened very, very quickly,” the deputy commissioner of police, Tony Cooke, said.

“The officer was in the near vicinity, attended on her own, was guided to the location of the offender by people who were in the centre and she took the actions that she did, saving a range of people’s lives.”

Albanese thanked the officer, other police, first responders and the “everyday people” who reacted to help victims.