The incident took place at Samgong village near Williamnagar on Friday, and a manhunt is underway to trace the accused, they said.
The teenager was allegedly hacked with a machete by the assailant in full public view, a senior police officer said, adding, the reason behind the killing is yet to be ascertained.
The body was taken to Williamnagar Civil Hospital for post-mortem examination, he said.
“An investigation is underway. Police have also announced rewards for any information about the accused,” the officer said. PTI JOP RBT