Agartala: Four common leopards have died in Tripura's Sepahijala wildlife zoo and sanctuary since Monday due to Felina babesiosis, a tick-borne malaria-like illness, an official said here on Friday.

"All the four common leopards died in the zoo. We have held an emergency meeting with K.K. Sharma (an official at the College of Veterinary Science, Guwahati) and taken all precautionary measures to ensure the safety of other animals," said zoo director Krishna Gopal Roy.