Ansar al-Sharia in Tunisia (""Supporters of Islamic Law in Tunisia"") is a radical Islamist group that operates in Tunisia. It has around 1,000 people as part of the movement. It has been listed as a terrorist group by the Tunisian government as well by the United Nations, the UAE, the United Kingdom and the United States. Some of its members may be linked to the 2015 Sousse attacks.
Members of the group live in New York.
They believe there are members in the United States, but the text doesn't indicate if there are any in New York specifically.