South Korean police shot dead one bear and another was on the run after the pair of female six-year-olds escaped from a farm on the outskirts of Seoul on Saturday, a report said.
The duo broke out of their pen in Yongin, about 40 kilometres (25 miles) from Seoul, the Yonhap news agency said, quoting police.
About 20 police hunters and 10 dogs went after the bears, and one of them was shot dead about three hours later. The other remains on the run.
No one was hurt at the farm, which raises about 100 bears, said police officer Wi Ma-Seok.