Elizabeth Michael, popularly known as Lulu, said that the wildly popular actor had telephoned her to accompany him on an outing but on reaching his house, she said that she did not feel like going out, the independent Citizen daily reports.
Kanumba, 28, reportedly became angry forcing her to flee his house.
Lulu, herself an actress, told an interviewer that she had no idea of what happened after she hurriedly left the house, the paper said.
Police said Kanumba, famous in West and East Africa for roles in Tanzanian soaps and films, died in an accidental fall after the quarrel.
Medical sources said initial findings suggested he had died of brain trauma caused by blunt force.
The actor was buried Tuesday in a burial attended by the who’s who of Tanzanian society including high-level government officials led by vice president Mohamed Gharib Bilal and First Lady Salma Kikwete.
Tanzania President Jakaya Kikwete said he had delayed a foreign trip on learning of the death and termed Kanumba a brilliant and talented ambassador who had marketed his country thorough his acting roles and helped develop the local industry.
Police had a hard time controlling the surging crowds, with an estimated 30,000 mourners having attended his burial, with most to confirm that he was dead.
The funeral was believed to be the biggest since that of the country’s founding father, Julius Nyerere, in 1999.
Lulu, who has been arrested, only opened up to a criminal psychologist, the paper reports, quoting highly placed police sources.
Kanumba, nicknamed ‘The Great’, had just returned from a trip to Ghana and was due to travel to Hollywood in the United States.
He starred in the big “Bongo” films as the Tanzania industry is called and had also been cast in Nollywood, Nigeria’s version of Hollywood.