Police are seeking an apparent black nationalist in connection with the Tuesday subway attack in Brooklyn in which 10 victims were shot and at least 29 injured overall.

The man, identified as 63-year-old Frank James, had a volatile collection of social media postings, including one in which he said he was  “entering the danger zone,” according to the New York Post.

After first identifying James as a “person of interest” in the attack, police labeled him a “suspect” Wednesday morning, according to CNN.

This is Frank James who is a person of interest in this investigation. Any information can be directed to @NYPDTips at 800-577-TIPS. pic.twitter.com/yBpenmsX67

— NYPD NEWS (@NYPDnews) April 12, 2022

Police traced James in a trail that began with a credit card and a van key left at the scene and then led to a U-Haul found later in Brooklyn, according to the Post. Police said that they believed James had been living out of the van, the Post reported.