The man was, however, rescued by the zoo staff within a few minutes of the incident.
According to zoo assistant director Kamal Lochan Purohit, the man allegedly kept his water bottle, shoes and dress outside and jumped into the enclosure. "Although his body does not have any fatal bite mark, he sustained injuries as the lions dragged him for nearly 60 metres," Purohit told IANS.
"He deliberately jumped into the enclosure. It was an unfortunate incident," Purohit said.
The man has been identified as Suryanarayan Das, a resident of Ganjam district. He has been admitted to a city hospital and is currently out of danger.
Nandankanan zoo, literally meaning 'The Garden of Heaven', is spread over 425 hectares. It has over 1,200 animals and offers a first-of-its-kind white tiger safari. It houses 11 lions.
Photos: Shraddha Kapoor, Kim Sharma at 'Haseena Parkar' screening
Mumbai to Goa train: First look at the glass-top Vistadome coach
Shuttler Ashwini Ponnappa keeps it short and sexy on social media
Photos: Narendra Modi, others at Marshal Arjan Singh's funeral
Photos: Sussanne Khan and Nimrat Kaur spotted at a spa in Juhu