American tourist and Ugandan guide kidnapped by gunmen at popular safari park

American tourist, 35-year-old Kimberly Sue, was with a local guide, Jean Paul, and at least two other tourists at Queen Elizabeth National Park yesterday when they were ambushed by four gunmen. Sue and the driver were kidnapped, leaving the other tourists behind.
According to NBC News:
The assailants used one of the victims' cellphones to call authorities and demand $500,000 for their release, police said, adding that they 'strongly believe this ransom is the reason behind the kidnap.'
Four kidnappers abducted the American and the driver, taking their keys but leaving the vehicle behind, according to police. The others in the vehicle escaped unharmed and later contacted authorities. The government earlier said that four people had escaped the incident.
Police said they have blocked the nearby border in an attempt to corner the kidnappers.
Queen Elizabeth National Park is Uganda's most popular tourist destination, according to their website.
Image: by Cody Pope - Own work, CC BY-SA 3.0, Link