An armed robber hopped the counter at an American National Bank branch in Council Bluffs.
Police were called to the branch near S. 27th Street and Broadway around 10 a.m.
The teller told police a man, wearing a hooded sweatshirt and ski mask, walked into the bank with a gun. He jumped the counter and demanded cash.
The robber was last seen leaving leaving with an undetermined amount of money; however, police said the dye pack exploded. They found stained bills along Avenue A.
So far, no arrests have been made.