At his arraignment in Boston Municipal Court, Josue Estrada, 30, was ordered to stay away from the victim and the station, said Jake Wark, a spokesman for the Suffolk County district attorney’s office. Bail was set at $500.

A Boston man who claimed to be a ninja pleaded not guilty Friday to charges that he indecently assaulted a woman at Downtown Crossing Station, officials said.

Estrada was arrested around 9 a.m. Thursday after he allegedly assaulted a woman while she was walking through the station from the Orange Line to the Red Line, MBTA Transit Police said in a statement. The woman pointed him out to Transit Police when they arrived.


When officers tried to arrest Estrada, he resisted and referred to himself as a ninja, Transit Police said. After a physical struggle, officers were able to take him into custody.

Estrada is to appear in court again June 12.

Aneri Pattani can be reached at aneri.pattani@globe.com. Follow her on Twitter @apattani95.