Detectives were Sunday reviewing the closed-circuit television (CCTV) footage of the restaurant Interior Cabinet Secretary Joseph Nkaissery visited on Friday night before he died hours later.
In addition, at least 10 people who interacted with Mr Nkaissery at the Bomas of Kenya Lounge, at his Karen home where he fell ill and at Karen Hospital where he was pronounced dead at around 1am, have been questioned by police.