Boniface Kariuki, the 22-year-old hawker shot at close range by police officers during Tuesday's demonstrations in Nairobi, is under round the clock observation at Kenyatta National Hospital.

On Wednesday, the hospital's CEO William Sigilai said the patient remains on mechanical ventilation as medics keep close observation. "He was critically ill with a gunshot on the head resulting in severe brain injury and excessive bleeding," Sigilai said.  "The emergency team led by Dr Sugut swung into action, stabilised his condition and placed him on life support." The medics said upon further examination, it was established that the bullet struck Kariuki on the left side of the head.

He was wheeled to the theatre around 8:50pm for a delicate surgery conducted by a multidisciplinary team lead by Dr Sam Njiru, a consultant neurosurgeon.

The procedure, the doctors said, lasted two hours and the bullet was successfully removed then the patient was moved to ICU.