John Barnabas Mchanga was stoned to death by an irate public after he stabbed the two people to death at City View Bar in Eastleigh, Nairobi.
Police said the man confronted a female manager in the casino and demanded more cash to gamble with. When the manager declined to give him the money, he attacked her with a Somali sword, killing her on the spot.
The assailant then attacked a security manager who had intervened to help the woman and killed him on the spot.
A third security manager was injured during the incident before the man was killed by a mob.