http://nma.tv | http://www.nma.com.tw A post-exam celebratory trip to a Xian zoo for a 15-year-old student ended in tragedy after his father was mauled to death by five Siberian tigers. The 45-year-old man was attacked by the animals at the Qingling Wildlife Park when the pair wandered into the enclosure after a worker forgot to close the door properly. Zoo workers managed to rescue the boy, who suffered minor injuries, by driving jeeps at the tigers but his father suffered was already dead after suffering head and neck wounds in the attack.