Arson is possibly the cause of a Brooklyn apartment fire that injured nine people early Tuesday morning, according to the NYPD. The fire broke out on Evergreen Avenue in Bushwick around 2:50am. It had started on the first floor, according to the FDNY. A man in his 60s was seen starting the fire with an unknown substance inside the building, witnesses told police. Nine people suffered from smoke inhalation, according to authorities. Click here to read more on pix11.com.