The mutilated carcass of the leopard, found by the KWS officials, had been sent for autopsy, Shailesh Prasad, Field Director, Dudhwa Tiger Reserve, said today.
The tiger attacked the leopard on Friday night near Khaira village in Motipur range, he said.
Spotting the leopard in its territory, the tiger attacked the small cat and broke its neck, Prasad said.
Leopards often take shelter on fringes of the forest killing animals like dogs and generally avoid encounters with tigers, say wildlife officials.