NEW YORK (AP) — New York City's police commissioner says the gunman who ambushed and killed two police officers had made online posts that were "very anti-police."

Police Commissioner William Bratton choked up at a news conference Saturday afternoon as he talked about the fatal shootings of two officers in Brooklyn's Bedford-Stuyvesant neighborhood.

Bratton says gunman Ismaaiyl (IHSH'-mayl) Brinsley shot and wounded his former girlfriend in Baltimore earlier Saturday and made posts from her Instagram account.

Authorities didn't get into the specifics of the contents of the posts, but two officials told The Associated Press that he posted about shooting two "pigs" in retaliation for the death of Eric Garner. They spoke on condition of anonymity because they were not authorized to speak publicly.

Authorities say the gunman fatally shot himself after killing the officers.

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Associated Press writer Jonathan Lemire contributed to this report.