Animal rights campaigners are urging a South African game park to reverse its decision to put down a lion who escaped on Sunday.
The lion, called Sylvester, crawled under an electric fence after heavy rains dislodged earth, according to a Karoo National Park spokeswoman.
The park authorities intend to use a helicopter to find the lion.
He was fitted with a tracking collar after he was on the loose for three weeks last year.
Last June, Sylvester went on a sheep-killing spree, wandering 300km (180 miles) before he was found taking a nap by rangers and airlifted from the Nuweveld Mountains in Western Cape.
On his current escape, he has already travelled at least 20km (12 miles) and killed a cow, according to AFP news agency.
On Tuesday night South Africa National Parks tweeted that it is a difficult decision to put down the lion once they find him.
The hashtag #SaveSylvester has been trending in South Africa since Wednesday morning as campaigners urge the parks to reverse their decision.
Meanwhile in Kenya, another lion was shot dead by a ranger on Wednesday after he escaped from a park in Nairobi.
Several lions have escaped from the park in recent weeks.