Hamilton Police are investigating the aggravated robbery of the Challenge Service Station on Naylor Road.
Atabout 9.50pm, four offenders entered the store and assaulted an employee before stealing cigarettes and cash.
The employee received a minor injury, says Detective Sergeant Andre Kavanagh.
"One of the offenders was armed with a knife. The offenders were wearing hooded sweatshirts and carrying bags.
"The offenders fled the scene in a stolen silver motor vehicle which drove off in easterly direction along Cambridge Road. The vehicle was located on Morrinsville Road a short time later."
Hamilton Police would like to hear from anyone who can identify any of the offenders shown in the attached pictures, or provide any information.
If anyone can help, please contact Detective Sergeant Andre Kavanagh on 07 858 6200.
Alternatively, information can be left anonymously with Crimestoppers on 0800 555 111.