The attack by the full-grown leopardess took place last night at Kukura Chora Bahoi village when three daily wagers and a minor boy were returning from work, the sources said.
Locals in the area claimed that the animal had taken away over 10 goats and calves from the area in the past 15 days.
The animal has created panic in various localities of the area, they added.
The injured were taken to the Jalukanibari PHC and later rushed to Jorhat Medical College, the sources added.