Heavy police presence seen in NYC Sunday amid IED probe near Gracie Mansion NYPD is asking residents to avoid East End Avenue amid ongoing IED investigation near Gracie Mansion. (Credit: Peter Gerber) NEW You can now listen to Fox News articles! The NYPD has cordoned off a tony Manhattan block near the mayor's residence amid a continuing probe into a potential terror plot involving improvised, ISIS-style bombs. "Due to ongoing police activity, please avoid the area of East End Avenue between