Former powerful Cabinet minister Simeon Nyachae is admitted at the Nairobi Hospital Intensive Care Unit after falling ill a week ago.
Sources said the octogenarian politician had been checked into the hospital after he tripped and fell at home.
While at the facility, he complained of severe chest pains and was immediately taken to the ICU for closer monitoring.
His eldest son, Charles Ayako Nyachaei, a judge at the East African Court of Justice, confirmed that his father was diagnosed with a chest infection.
The former chairman of the defunct Constitution Implementation Commission was, however, guarded on the details of the illness, citing family confidentiality.
“What I can tell you is that he complained of chest pains and was put in ICU,” he told the Star.
When pressed further, Ayako said his father was still under medical observation and that doctors were carrying out further tests to establish the cause of the infection.
“It is doctors who decided that he gets more tests, otherwise Mzee is out of danger,” he said.
A chest infection is usually an infection of the lungs or airways, which can lead to difficulties in breathing.