Wildlife rangers in Zimbabwe said they have put the northern resort town of Kariba on full alert after rogue lions mauled to death two people near a suburb there.
The National Parks and Wildlife Authority said fliers are being handed out in the town today and volunteers are using a loudspeaker to caution townspeople on the dangers of lion attacks on the shores of Lake Kariba, a man-made hydroelectric dam popular for fishing and tourism.
It said one man escaped from a lion attack on Tuesday, but the woman with him was savaged to death. An arm and remains of a second corpse were found by rangers hunting for the lions. The authority warned people against walking at night and using footpaths through the bush as shortcuts.
Meanwhile, a female volunteer was killed by a lion at a private wild animal park in Central California.
Cat Haven founder Dale Anderson was crying as he read a one-sentence statement about the fatal mauling at the exotic animal zoo he has operated since 1993.
The 26-year-old intern was attacked and killed on Wednesday when she entered the lion's enclosure, Mr Anderson said, but he refused to answer questions or provide more details.
He said Project Survival would investigate to see if the woman and another worker who was on-site followed the group's protocols. "We take every precaution to ensure the safety of our staff, animals and guests," he said in a written statement
Sheriff's deputies responding to an emergency call from Cat Haven, in the Sierra Nevada foothills east of Fresno, found the woman severely injured and still lying inside the enclosure with the lion nearby, Fresno County sheriff's lieutenant Bob Miller said. Another park worker had unsuccessfully tried luring the lion away and into a separate pen.
Deputies shot and killed the animal so they could reach the wounded woman, who died at the scene, Mr Miller said.
Investigators were trying to determine why the woman was inside the enclosure and what might have provoked the attack.