The carcass was found by local people in Rangsali area under Rongbong police station in Karbi Anglong district bordering Golaghat district, official sources said today.
The elephant's trunk was severed and found a little distance while there were injury marks on the right leg, the sources said.
The local people claimed that the poachers had driven the tusker from the forests in Karbi Anglong hills before killing it.
The forest department took away the carcass for post-mortem.