WARNING: DISTRESSING CONTENT The 18-year-old high school student was arrested on suspicion of attempting to murder his uncle View 2 Images The teen is accused of poisoning his uncle (Image: Getty Images)

A Japanese high school student has been arrested on suspicion of attempting to murder his uncle by spiking his miso soup with extracts from a deadly oleander plant.

Oleander is extremely toxic to both humans and animals , with every part of the plant - including the leaves, stems, roots, flowers, and fruit - being highly poisonous.

The 18-year-old lad from Ichihara City, Chiba Prefecture, is believed to have tried to kill his uncle around midday on July 17 by chopping up and mixing leaves of the lethal plant into his uncle's meal.

The miso soup reportedly contained a fatal

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