The attackers were dressed in full military uniforms, but the army denies it was responsible.
Photos and videos on social media showed people wailing around the mine-shaft entrance.
Almost 100 percent of Africa has been vaccinated.
Removing the ship is likely to take months.
Officials say the spilling fuel is endangering corals, fish and other marine life around the Indian Ocean island.
Kabuga is accused of financing the militias that killed about 800,000 Tutsi people.
The first payment of 1000 cows had already been sent to Angola's capital.
"We are the only community in the world who are custodians of the white giraffe."
The rare animals were found dead in a Ugandan national park.