MANCHESTER, N.H. (AP) — A man is accused of robbing a New Hampshire convenience store while armed with a sharp rock, then returning hours later to give back the money.

Police say 46-year-old Carlos Reyes, of Manchester, was charged with robbery and was scheduled to be arraigned Wednesday. It wasn't immediately known if he had lawyer, and a phone number couldn't be found for him.

Officers responded to a Shop-N-Go just after noon Tuesday. Witness Saoul Haney tells WMUR-TV (http://bit.ly/1spGUG7 ) that the robber apologized for the theft as he fled the scene and said he needed the money.

The clerk called police hours later and said the man had arrived to "turn himself in" and began crying.

Reyes was arrested after police reviewed surveillance photos.