New York City Mayor Bill de Blasio said the explosion was "intentional" but there was no evidence to classify it as a terrorist attack.
“There is no evidence at this point of a terror connection to this incident, this is a preliminary information,” de Blasio told journalists.
The police have found another suspected improvised explosive device made of a pressure cooker, wires and a cell phone.
A large police truck hauls second bomb in explosive container. #ChelseaExplosion #Chelsea #explosion @NYDailyNews pic.twitter.com/CSzNQXSVJb
— Edgar Sandoval (@edjsandoval) 18 сентября 2016 г.
Investigations are underway.