Former President Daniel arap Moi was has been admitted to Nairobi Hospital for a routine medical check-up.
His physician Dr David Silverstein Wednesday said Mr Moi will spend a few nights in the hospital for doctors to have enough time to examine him.
Mr Moi's admission was announced by his office in a short statement.
The former president turned 94 on September 2 and his birthday was celebrated in a private function at his Kabarak home in Nakuru County.
A statement by his press secretary Lee Njiru said he was with immediate family members who included his children and grandchildren.
Late in March, the former head of State was discharged from Ichilov Hospital in Tel Aviv, Israel, where he had gone for medical check-ups.
While there, he visited historical sites in Jerusalem.
“Mzee has been released after doctors gave him a clean bill of health after check-ups on his knee, which had been causing him discomfort,” read a statement from his office.
Mr Moi's office had dismissed claims on social media about his health.
The problem with his knee began on July 30, 2006 after he was involved in an accident in Limuru.
He had been travelling to Kabarak from Machakos, where he had presided over a graduation ceremony at Scotts Theological College.
On January 27, 2017 the former president underwent a minor surgery on his knee at the Aga Khan University Hospital in Nairobi.