RAPID CITY, S.D. (AP) - Federal officials are offering up to a $5,000 reward for information leading to convictions in two armed robberies in Rapid City.

The Bureau of Alcohol, Tobacco, Firearms and Explosives is offering the reward in the Dec. 29 robbery at the Royal Casino and the Monday robbery at the King of Hearts Casino.

In the first robbery, a female assaulted a clerk and got away with an undisclosed amount of cash. In this week's holdup, two females did the same thing.