COLUMBUS: A black bear cub scaled a 3.6m fence in its new enclosure at an Ohio zoo and escaped for about 15 minutes before being corralled and sedated. The Columbus Zoo was put on lockdown on Saturday morning for a few minutes until workers could contain the seven-month-old cub named Joan, said zoo spokeswoman Patty Peters. No one was hurt. Two rescued cubs that had been abandoned in the wild and arrived at the zoo just a few months ago were being moved into a new habitat on Saturday. The one named after rocker Joan Jett climbed the fence and managed to evade a “hot wire” that would have given her a jolt, Ms Peters said. The cub stayed between her habitat and a wolverine exhibit before going over a wooden fence, The Columbus Dispatch reported.