Democratic presidential candidate Hillary Clinton will return to South Dakota for the second time in a week Thursday.

The U.S. senator's campaign staff says she will make a public appearance in Aberdeen.

However, the location and time have yet to be announced.

Clinton stopped in Sioux Falls last Thursday.

Her opponent, Barack Obama, is scheduled to make his first campaign stops in South Dakota on Friday.

Sen. Obama will visit both the Watertown area and Sioux Falls. Details of the stops have yet to be announced.

The primary election in South Dakota will be held June 3.