Two children, including an infant, are injured after a fire broke out in their Bath Beach, Brooklyn apartment building.

Investigators say a fire broke out on the second floor of the seven-story building on 65 Bay 19th St. just before 6:30 a.m. on Wednesday. Footage shows windows completely shattered, hallways and walls charred and water flooding the main lobby.

Tenants in the apartment where the blaze broke out left their fire-proof door open and so flames quickly spread and smoke filled the hallways.

At least 16 people were hurt in an early morning fire in Brooklyn, and smoke-filled hallways made it hard to breathe, forcing residents to escape through windows or off fire escapes.A 42-year-old man and two children -- boys ages 5 and 5 months -- were critically injured after being overcome by smoke in an attempt to escape the building.

Brooklyn firefighters battled an intense fire on Wednesday morning that injured 16 people — including three residents left in critical condition. The two-alarm inferno broke out inside 65 Bay 19th St.

Two children and several firefighters were among those treated for injuries after a fire broke out early Wednesday morning in Bath Beach, Brooklyn. CBS News New York's Zinnia Maldonado reports from the scene.

Sixteen people, including six firefighters and at least two children, were injured in an early morning fire at a Brooklyn apartment building, the FDNY said. The fire started just after 6 a.m. in a seven-story building at 65 Bay 19th Street in the Bath Beach area,