The Virunga National Park in eastern Democratic Republic of Congo has closed to tourists until June 4, Tourism Update says.
The announcement comes after two British tourists were kidnapped on May 11 and later released. Their ranger, 25-year-old Rachel Masika Baraka, was killed in the ambush.
Until the attacks last week, no incidents against tourists had been reported in the park. The kidnapping was resolved through co-operation between Congolese authorities, senior park staff and the UK Foreign and Commonwealth Office.
The park, a Unesco World Heritage Site since 1979, covers 7 800sqkm and is home to a quarter of the world's mountain gorilla population as well as lowland gorillas, indigenous fish species and a number of volcanoes.