MOSCOW: A Russian woman who smuggled a 50-kilogram (110-pound) lion cub onto a sleeper train claiming it was a domestic cat was being questioned on Thursday, police said. The big cat was exposed after it began behaving aggressively early on Thursday on a passenger train heading for the city of Yekaterinburg 1,400 kilometers (850 miles) east of Moscow, police said. The lion cub’s female owner “could not cope with the situation and it was necessary to urgently isolate the animal which was running wild,” police said. “The lion cub had first been kept in a cage but then the woman accompanying it for some reason let the animal out,” a police spokesman told the Interfax news agency. The woman faced questioning on “how she carried a 50-kilogram, nine-month-old lion registered in travel documents as . . . a domestic cat,” police said.