TULSA, Oklahoma - Tulsa Police hope the release of surveillance video will help detectives track down three people involved in two business robberies in July.

Police say two people robbed a Walgreens clerk at the store near 31st and Garnett in the early hours of July 15.

Detectives say the pair went into the store at 12:40 a.m., armed with a knife and demanded money. Both were wearing white, long sleeve shirts and black pants and covered their faces with what appeared to be black aprons.

Because of that, officers believe the pair may work for a catering service and had just left work.

In the other robbery, Tulsa Police say a man is seen on surveillance video walking into the Arby's at 69th and Lewis on July 27 at 10:45 p.m., pointed a handgun at an employee and demanded money.

He ran off after getting the cash.

Detectives say he may have been driving a yellow Ford Ranger pickup truck.

If you have any information about either robbery, call Crime Stoppers at 918-596-COPS or text 918TIP to "Crimes."