AsiaOne's infographic shows how a Singapore Zoo cleaner got mauled by three white Bengal tigers when he jumped down into their enclosure. The cleaner died of his injuries on the way to hospital. Visitors thought the attack was a show. The zoo meanwhile has stepped up patrols and ordered its zookeepers and staff to look out for eratic and abnormal behaviour in the animals, staff and visitors.
Update: Here's the Q&A from the press release issued by the Singapore Zoo (thanks Joel Pang) and a Reuters video of the incident (thanks Rickie). Video of the incident caught by a Zoo visitor shows up online!