Four teenage boys have been charged after allegedly chasing and stabbing another boy at a train station.

The 15-year-old victim was allegedly stabbed in the chest and stomach at Doonside Railway Station in western Sydney about 5.15pm on Wednesday.

He was treated at the scene before being rushed to Westmead Children’s Hospital in a stable condition with non-life-threatening injuries.

Police seized a knife shortly after the attack and arrested three teenagers — two aged 16 and one aged 15 — at Nurragingy Reserve near the station.

A fourth boy, aged 16, was arrested at his home on Varuna Pl about 10am on Thursday following further investigations.

All four have been charged with affray and using a knife in a public place, causing a person to fear for their safety.

They were refused ba

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