Hartford firefighters are investigating a fire in an apartment building on Willard Street than sent ten people to the hospital for smoke inhalation Wednesday.

The fire broke out at 50 Willard Street around 1:45 p.m. Ten people were treated on scene and transported to Hartford Hospital for smoke inhalation. No other injuries were reported.

(Mario Boone / WTNH)

Firefighters are conducting their investigation to determine what may have caused the fire.