A Kenyan wildlife official says a tracking team including a helicopter has been deployed to locate two lions that were reported to have strayed out of the Nairobi National park, a day after another lion was killed after it injured a man.

Kenya Wildlife Service spokesman Paul Gathitu said Thursday the two lions were reported to have been seen near a settlement in the southern side of the park which is not fenced.

KWS said Wednesday they had no choice but to kill a lion in Nairobi's outskirts after it became too agitated by the noise of a gathering crowd.

Conservationists and ordinary Kenyans are expressing anger over the decision by wildlife authorities to kill the popular lion known as "Mohawk" instead of capturing it.