Manhattan, NY —  A heavily armed suspect opened fire in Midtown Manhattan on Monday, injuring multiple people — including at least one NYPD officer — before reportedly taking his own life, according to authorities. The New York Police Department confirmed they responded to a call of shots fired at 345 Park Avenue, a major high-rise office tower that houses major firms such as Blackstone, KPMG, J.P. Morgan, and the NFL. The incident unfolded near East 52nd Street between Park Avenue and Lexington Avenue, prompting a full-scale emergency lockdown in the area. Witnesses and social media footage show chaos erupting as…