"The truth of the matter is that this is not a genuine accident," said spokesman Sibanengi Dube in a statement.
"This is a perfect organised hit which was designed to eliminate the President of MDC."
"We sincerely believe that the powerful but notorious Zanu-PF clique is determined to do anything to scamper efforts by the inclusive government to get Zimbabwe back on the track," said Dube.
On Friday, Tsvangirai and his wife were involved in a collision with a truck while on their way from Harare.
They were headed to a rally for Tsvangirai’s political party.
Tsvangirai’s wife, Susan, died on the scene. Tsvangirai is currently being treated for injuries at a Harare clinic. – Sapa