The son of Rwanda's first President, Dominique Mbonyumutwa, has told the BBC he is protesting against an order to exhume his father's remains.
"We don't understand why the grave must be moved," said Shinguiro Mbonyumutwa, adding that he has written to the authorities asking them to reconsider.
The mayor of Muhanga district has given the family 60 days to decide where they want the former president re-buried.
He was buried in Gitarama town's sports stadium, which is being redeveloped.
The stadium, called Democracy Stadium, is where Rwanda's Hutu leaders declared that the Tutsi monarchy would be abolished.
Analysts say the Tutsi-dominated government may be trying to marginalise the role of Mr Mbonyumutwa, a Hutu, and the stadium.
Mr Mbonyumutwa's family said the government order contravened an earlier court ruling, which instructed the government to take care of the tomb.
He became interim president in 1961 when Rwanda gained independence from Belgium.
He died in 1986.