Security at a Livingston supermarket has been beefed up after an armed robbery.Officials say the incident took place early Monday morning at the Pathmark store on Eisenhower Parkway. According to officials, two men with guns robbed six overnight employees and three other people.Police say the robbers then tied the victims up and left them in a meat locker for more than an hour. One woman was injured in the attack, but officials say she is expected to be OK.The workers were given Tuesday off and the company has reimbursed them for their stolen items. Police are still searching for the two men.