CHCIAGO — Chicago police have issued a community alert after a string of food truck robberies on the South Side.

There have been three armed robberies this month and one back in June.

One robbery happened Sept. 3 on the 1700 block of West 47th Street and another happened at the same location on Sept. 21. Both robberies happened between 4 a.m. and 5 a.m.

Two other robberies happened on the 1900 block of West Pershing Road on June 30 at 4:14 a.m. and Sept. 19 at 4:15 a.m.

In all four cases, police say the men pulled guns on food truck vendors and took their valuables.

Police described the suspects as three Black men between the ages of 18 to 30 years old, 5 feet 8 inches to 6 feet tall. They were also wearing black baseball caps, black hoodies, blue jeans and black ski masks.

The men were seen driving off in a white sedan or SUV.

Police urge the public to be aware of their surroundings and stay cautious.