"Uganda must find the kidnappers of the American Tourist and guide before people will feel safe in going there," Trump wrote in a Twitter message. "Bring them to justice openly and quickly!"
The kidnappers initially demanded a $500,000 ransom for freeing the 35-year-old US citizen and her driver. Later they returned them to a lodge in the park, ABC News reported, citing a spokesman for the Ugandan safari operation. It remains unclear how much was paid to the kidnappers.