Four people died and at least 19 people were injured in a fire at a pachinko parlor in the city of Osaka on Sunday afternoon, police and firefighters said. They are still investigating whether there are other people who failed to escape from the parlor, they said, while some reports said a man around 30 years old had started the fire.

The police said they have started an investigation into the fire as a case involving murder and arson.

The four dead are a man in his 60s and three women, while five of the 19 injured were are in serious condition, the firefighters said.

Witnesses reported seeing one woman fleeing from the building with her back on fire.