Hostage-takers have released a toddler, its nanny and a driver kidnapped four days ago in Nigeria's oil-rich south, police said Sunday. The three were released Saturday, Rivers state Police Commissioner Felix Ogbaudu said, but could not give further details or information about their condition. They had been snatched in a daytime raid on a house in an affluent suburb of the main southern oil city, Port Harcourt, the Associated Press reported.