The statement added that the closure would last "a few days" until a "restructuring and systems overhaul" is finalised.
Kabila's arrival comes after senators stripped him of his immunity over alleged support for the Rwanda-backed M23 rebel group.
He is back in the country for the first time in two years
"It is extremely important to convey to a wide audience an objective picture."
Through words and sacrifice, they forged the path to liberation.
The South African parliament said it views the day as a "rallying point" for every African country to reflect and act to improve the lives of its people.
The militants are still fighting for the independence of Cameroon's two anglophone regions in the francophone country.
"Hii ndiyo rasilimali yetu tuliyoachiwa, hatuna nyingine"
The 53-year-old made a 45-minute speech live on YouTube on Friday evening
