honolulu, zoo, officials, are, investigating, planning, additional, security, after, berani, pound, male, sumatran, tiger, got, out, its, enclosure, thursday, morning, this, has, two, other, tigers, both, female, newer, section, exhibit, city, department, enterprise, services, director, sidney, quintal, said, yesterday, that, zookeeper, neglected, to, secure, gates, cleaning, it, was, released, back, into, he, pushed, through, open, area, separated, from, public, by, fence, slightly, higher, than, feet, resting, against, walking, forth, as, visitors, take, photos