A student in Japan has been detained after killing his mom and grandmom with a crossbow.

Takarazuka city police in the Hyogo region in western Japan have detained the college student at the scene of the incident in a residential neighborhood, CNA reported referring to the local Kobe Shimbun newspaper.

Two adult women were confirmed dead at the hospital, the newspaper said.

At least two people have been hospitalized.

The attacker reportedly confessed saying: "I killed several members of my family."