NEW YORK -- Police are searching for a suspect in the violent attack on a woman on a subway in Brooklyn on Thursday afternoon.

Investigators are looking to identify the man they say is responsible.

They said he first grabbed a woman's butt, then followed her onto a train and punched her multiple times, fracturing her nose.

Police said the man also made anti-LGBTQ remarks before fleeing the train at Delancey and Essex streets in Manhattan.

The assault first started on the "J" train platform at Myrtle Avenue in Bedford-Stuyvesant.

Anyone with any information is asked to call the NYPD's Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or via DM on Twitter, @NYPDTips. All calls are kept confidential.