CHICAGO (CBS) — Police have issued a business alert after three robberies of Chinese restaurant delivery men on the South Side.

Police say the robberies took place Jan. 18, Jan. 31 and this past Wednesday in the 600 block of East 102nd Place in the Roseland neighborhood.

Police News Affairs says the victims would show up at that block to make a delivery and when they called to say they were there, two suspects would come out and rob them. A gun was implied in all three hold-ups, but one was never shown.

On Feb. 13, police say, a 55-year old deliveryman was hit in the face with pepper spray and the suspects then went through his pockets and took his money, cell phone, house and car keys, as well as the food order.

On Jan. 31, a 33-year old victim showed up and when the two suspects approached him, implied they had a gun and told him to cover his eyes before they took his iPhone, wallet and his car’s GPS system.

The Jan. 18 robbery victim was 54-years old and was grabbed by the neck by one of the two suspects, according to police.

The other suspect then went through the delivery man’s pockets and took his walled that contained his driver’s license, cash and credit cards. They also took two food orders.

The police department is warning businesses to warn their employees to be watchful for suspicious activity and if confronted, to remain calm and try to remember any distinguishing features about the suspects, such as birth marks or tattoos.

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