The two men, their faces covered and hoods over their heads, walk into the Bottom Dollar grocery store in Laurel with guns drawn Thursday.
Prince George's County police tell ABC7 the store was packed with customers when the men shot the guard. They say the suspects first argued with the guard, then grabbed his gun from him and shot him in the torso.
Now the guard is in serious condition but is expected to survive.
The gunmen managed to escape before police got there.