POLAND — Gruesome video shows a 17-year-old carrying out a brutal double killing inside a home, slaughtering his stepfather with a hammer and his grandmother with an axe.

Authorities say the victims were found inside the residence after suffering fatal blunt-force and sharp-force injuries. The footage captures the actual moment of the attacks.

Investigators identified the victims as the suspect’s stepfather and grandmother. Both were killed during the same incident, which has shocked the local community.

Police launched a manhunt shortly after the killings. The suspect was later located and taken into custody near the Odra River, where he had been hiding in a makeshift shelter.

According to investigators, the case may be linked to disturbing material posted online prior to the attack. Authorities are reviewing digital evidence as part of the ongoing investigation.

The suspect faces potential life imprisonment if convicted. Officials have not released further details on motive as the investigation continues.