Melbourne man, 67, arrested over sex assault

A 67-year-old man has been arrested after a schoolboy was allegedly sexually assaulted on a Melbourne train.

Victoria Police on Thursday said the Camberwell man had been released without charge following his arrest late last week.

The 17-year-old victim was standing on a city-bound Alamein train on his way to school in late May when he was allegedly assaulted by a man in his 60s.