The UK government cautioned its citizens to avoid visiting a popular Ugandan park where two tourists were killed, including a British citizen and their local guide.
According to police and park officials, the three were attacked by gunmen while on safari in Queen Elizabeth National Park in southwestern Uganda on Tuesday, and their vehicle was set on fire.
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"If you are able to do so safely, you should consider leaving the area."
Uganda's wildlife department identified the two more victims as a South African tourist and a Ugandan guide.
Police blamed the attack on the Allied Democratic Forces (ADF), a rebel force associated with the Islamic State organization headquartered in the neighboring Democratic Republic of the Congo (DRC).
"Our joint forces immediately responded upon receiving the information and are aggressively pursuing the suspected ADF rebels," said police spokesman Fred Enanga.
Queen Elizabeth Park shares a border with the Democratic Republic of the Congo and its renowned Virunga National Park, home to rare mountain gorillas. She is believed to be managed by armed factions.
During a nocturnal game drive through the Ugandan park in 2019, four gunmen kidnapped a US tourist and her safari guide. After a ransom was paid, they were returned unharmed.
The ADF is a Ugandan rebel coalition whose main component is Muslim opposition to veteran President Yoweri Museveni.
Established in eastern DRC in 1995, the group quickly became the deadliest of dozens of banned forces in the province.