Man, 77, arrested after Sydney stabbing

A 77-year-old man has been arrested and his neighbour is fighting for life following a stabbing in Sydney's south.

Emergency services were called to a unit block in Miranda at 1.45pm on Saturday.

Police were told a man aged in his 50s had been stabbed numerous times after an argument between neighbours.

He was taken to St George Hospital in a critical condition.

The 77-year-old was arrested and taken to Miranda Police Station, where he is being questioned.

A crime scene has been established.