The two cases of African lions on the loose highlight the difficult balance between protecting people and conserving lions, whose numbers have declined dramatically over the past century because of unregulated hunting, a loss of habitat and growing conflict with livestock herders.
Concern about the threatened species intensified last year when an American dentist killed a lion named Cecil in a hunt in Zimbabwe that officials said was illegal.
Such decisions depend on factors including the training of wildlife experts, their resources and whether the area where a lion is roaming is densely populated. In some cases, local residents have killed lions before officials arrived on the scene.
Wildlife officials in Kenya shot the escaped lion several times after it injured a man in the Kajiado district, 57 kilometers (35 miles) from Nairobi, the capital, said Paul Udoto, a spokesman for the Kenya Wildlife Service.
"We didn't have a chance to save the lion," he said. Another senior Kenyan wildlife official, Kitili Mbathi, blamed a faulty electrical fence for the escape of the lion from Nairobi National Park.
"The lions periodically test the fence to see if there is a charge in it, and when there is no charge sometimes they will jump over and try and get to the livestock that is being kept next door to us at the army barracks" or in other nearby animal enclosures, he said.
The park is not entirely fenced and its wildlife is under growing pressure as the city expands.
