A Brooklyn fire injured eight people Saturday. Three kids and two adults were left in critical condition.

The most seriously hurt children were a 4-year-old girl who was being treated at Lutheran Hospital and an 8-year-old boy taken to Coney Island Hospital.

A man and woman in critical condition were also taken to Lutheran, as well as a 9-year-old girl and a 9-month-old girl, who were both in serious but stable condition. Other victims were treated at the scene.

The blaze, which began at around 2:15 p.m., was confined to a first-floor apartment in a 16-story building that is part of the Marlboro Houses, at 2250 W. 11th St. in Gravesend.

Fire officials said the apartment had a smoke detector and the blaze was not suspicious.

Neighbor Glenda Reyes had fled from the building, but then heard someone scream, “My babies! My babies!”

“I ran in to help the mother get her babies out,’’ she said. She said she heard the youngsters suffered smoke inhalation.