Des Moines police are asking the public's help in identifying two robbery suspects.

On Dec. 4, the Productos Mexican Grocery store, 2300 Hickman Road, was robbed by two suspects. It was the second robbery at this store in two weeks, police said.

Around 7 p.m., the clerk was threatened by a suspect with a handgun. A second person in red clothing is believed to be the look-out and driver of the getaway car.

The car appears to be a dark-colored, newer model Mercedes Benz. It may have bullet holes in it, because the clerk fired a handgun at the suspects as they fled the scene, police said.

Anyone with any information on the case is asked to call the Des Moines Police Department at 515-283-4811, or Crimestoppers of Central Iowa at 515-223-1400. An anonymous tip can be submitted online at www.crimestoppersofcentraliowa.com.