Police have arrested a 21-year-old man on suspicion of killing his 46-year-old mother and 82-year-old grandmother at their home in Matsue, Shimane Prefecture.

The suspect, Sogo Hara, was detained for questioning late Monday after being picked up on a street in Izumo city and charged with the murders of his mother Keiko, and her mother-in-law Yasue Hara, on Tuesday morning, Fuji TV reported. Police said Hara has admitted to killing the two women but has so far given no motive.

According to police, Yasue was found collapsed and bleeding at the bottom of the staircase at her home by a relative at around 9:30 a.m. Monday. Police said she had been beaten about the head by a hammer. Keiko was also found, on the second floor, bleeding from head wounds. Both women were taken to hospital where they were pronounced dead.

Source: ANNnewsCH