Stephene Mukabana, a youth leader of the Orange Democratic Movement, was killed last night when he rushed to the aid of a man being robbed by a six-member gang, police are quoted by the local Standard newspaper as saying.
However, Nairobi Governor Evans Kidero said a "group of assassins trailed and executed" the 42-year-old Mr Mukabana, the Standard reported.
According to Nairobi police boss Japheth Koome, Mukabana was driving into his compound when he heard screams from a dark alley where a man was being robbed.
“The reports we got show the deceased tried to help another robbery victim when he was shot in the head and chest,” said Koome.
The man was also shot and wounded but he is in a stable condition in hospital and he has given police details of what happened. Police say Mukabana was shot at close range by the gang that escaped without stealing anything from him. No arrest has been made so far.
But other ODM officials said Mukabana was trailed by people who wanted to kill him before he met his death.
The officials claimed Mukabana was dragged from his house before being shot at. He had declared interest in running for the Embakasi East parliamentary seat.
Nairobi Governor Evans Kidero said Mukabana was assassinated.
“I take this earliest opportunity to unequivocally condemn the act of lawlessness, cowardice and hooliganism that occurred in Chokaa, Mihango Ward yesterday night, where a group of assassins trailed and executed the ODM Youth Leader for Nairobi, Stephen Mukabana and murdered him in cold blood,” said Kidero.
He said such inhumane acts of impunity are regrettable and cannot be allowed to go unpunished in a county under his watch.