Sydney teen arrested after man stabbed

A teenager has been arrested after a man was stabbed in Sydney's northwest.

Police said the 57-year-old man suffered a stab wound to his abdomen after confronting two teenagers vandalising a footbridge with graffiti on Magdala Road in North Ryde about 5.15pm on Wednesday.

A 19-year-old man arrested nearby was charged with reckless wounding and possessing a prohibited drug and was refused bail to appear at Burwood Local Court on Thursday.