Four Found Dead with Stab Wounds After Tokyo House Fire

Victims include a woman in her 30s and three children under 10; police investigation ongoing.

The fire occurred in a two-story house in Tokyo's Shinagawa Ward on Thursday afternoon.
The bodies were discovered on a futon mattress in a first-floor bedroom.
A man in his 40s was hospitalized for smoke inhalation and is expected to be questioned by police.
The fire was reported by a relative who smelled smoke and found the entrance locked.
Authorities are investigating the incident as a possible homicide.