Updated

The U.S.-based aid group Samaritan's Purse says its South Sudanese staffers have been freed a day after being detained by "armed personnel."

A statement Tuesday says no ransom demand had been made. Rebels on Monday confirmed the workers had been "recovered" during fighting with government forces in the Mayendit area of Unity state.

The statement says the staffers are on their way to the capital, Juba, with help from the U.N. World Food Program. The statement doesn't say how many staffers had been detained, and it gives no details about the armed personnel who took them.

A famine has been declared in Mayendit, the latest crisis in South Sudan's three-year civil war. About 100,000 people are said to be at risk, and aid groups are pleading for access.