Police are seeking the public's assistance to identify the offender involved in a robbery at the Z Energy Service Station in Papamoa.

The robbery took place at 10.30pm on Monday night, where an unknown male was wearing socks, but no shoes, a police spokesperson says.

"Inside the premises, the male used a knife to threaten a female employee and rob the service station of a number of items, including cash and tobacco.

"The worker was left shaken and upset but was not physically harmed."

Police urge anyone with information in regard to the robbery to contact Constable Dan Matthews of Tauranga Police on 07 577 4300, or call Crimestoppers on 0800 555 111.