Police are still seeking a woman who made a hoax bomb threat from a Christchurch pay phone yesterday.

The call was made at 12.30pm by a woman from a phone on Colombo St - the city's main street.

The caller said a bomb was situated at a business premises.

But after police visited the location, a bomb was not found.

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Police are seeking a woman identified in CCTV images who was seen leaving the payphone used to make the call after it was placed.

"If you recognise them please contact the Christchurch Police Station on 03 363 7400," a release said.

"If you'd like to share information anonymously you can call Crimestoppers on 0800 555 111."