The president’s only surviving son suffered a head injury and broke his limb in the Tuesday night accident.
He is being flown to Germany for specialist care.
Meanwhile, former President Goodluck Jonathan has reacted to the news of Yusuf’s accident, saying himself and his family will continue to offer prayers for his recovery.
“I have been in Liberia monitoring elections and only just heard the sad news. My family and I are in prayers for the quick recovery of Yusuf Buhari. It is my deep desire that a young man so full of promise should live and thrive to fulfil the promises God has domiciled in him.”