A Colorado Springs pizza delivery man was attacked from behind and robbed of all of his pizza. It happened in the Retreat apartment complex Friday. Witnesses say that there were 6 or 7 people in their late teens or early twenties that had ordered pizza to an apartment address. Once the delivery man came, he was hit on the head from behind with a rock and the pizza was taken. The man was sent to the hospital and required 13 staples in his head. Police have made no arrests. Anyone with information on this should call police.