The owner of a pit bull that attacked a woman on a Brooklyn subway train has been arrested for the second time this week.

Police say 53-year old Ruben Roncallo has been arrested on charges of harassment.

They say the charges stem from a November stalking incident, where Roncallo threatened his ex-girlfriend over the phone.

It comes after Roncallo’s pit bull latched onto a woman's foot on a downtown 4 train last week.

That incident was captured on video, and Roncallo was charged with assault and reckless endangerment. He was released on bail Thursday.

He says his dog, Vinchy, is a service animal and claims that it was the woman who started the confrontation.

Roncallo is expected back in court on May 15.