A zoo in Australia went into lockdown on Wednesday when five lions managed to escape their enclosure.Keepers at Sydney’s Taronga Zoo issued a “code one” alert and police were called after CCTV footage showed a male adult lion called Ato and four cubs outside the main exhibit area at 6.30am local time.Guests staying overnight were rushed to safety as the lions managed to get within 100m of their accomodation, although the animals remained in an area separated from the rest of the zoo by a six-foot fence.