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NAGOYA (Kyodo) A 30-year-old man was arrested Saturday on suspicion of stabbing five members of his family, killing two, at a house in Toyokawa, Aichi Prefecture, and setting the building on fire.

Takayuki Iwase is suspected of stabbing his father, Kazumi, 58, around 2:15 a.m. Saturday while he was sleeping in a bedroom, the police said. He was later confirmed dead.

Tomomi Kanemaru, the 1-year-old daughter of Iwases younger brother, Fumihiko, was also confirmed dead.

Iwase, who is unemployed, was taken into custody at a funeral hall near the house after admitting that he stabbed the five with a kitchen knife and set fire to the house, the police said.

Iwase reportedly told police under questioning that he was angry that his account with an Internet service provider had been canceled by his father.

After receiving an emergency call from a neighbor at around 2:25 a.m., the police arrived and found the house on fire and the five family members inside with stab wounds. Police are treating the investigation as a murder case.