A 71-year-old woman is among 17 people injured in a massive New York apartment building fire.

Seventeen people were injured, officials said, including a 71-year-old woman who was fighting for her life when a fire broke out at an apartment building in Brooklyn early Monday morning.

The fire broke out around 6:40 a.m. on the fourth floor of an apartment building on Penn Street off Harrison Avenue in Williamsburg, the FDNY said.

One person, an elderly woman, was taken to Brooklyn Hospital Center with life-threatening injuries, officials said. She was in critical condition.

The department said three people were taken to NYU Langone Hospital in Brooklyn with minor injuries.

Thirteen other victims were treated on the spot with non-life-threatening injuries.

“We met a large number of patients early on and almost all of them at the same time,” FDNY deputy assistant chief Fred Villani told reporters. “After they were rescued by firefighters, the ambulance personnel at the scene had to make quick decisions about the severity of the injuries. One of the patients was in critical condition and was immediately taken to the hospital by Hatzalah volunteers.”

FDNY Deputy Assistant Chief John Sarrocco described it as “a very difficult process” to get the wounded out of the building “while the fire was burning.”

“Many people were escorted out of the building through interior spaces, and others through portable ladders and tower ladders,” Sarrocco said.

The fire reached two alerts, officials said, and 25 FDNY units, including 106 firefighters and emergency responders, arrived at the scene.

According to the FDNY, the fire was contained within about an hour.

The cause of the fire is being investigated.

Hours earlier, a three-story commercial building on Third Avenue near East 124th Street in East Harlem had experienced a massive fire with four alarms, according to the FDNY.

Four firefighters and one civilian were slightly injured in the blaze, officials said.

The FDNY responded to an automatic alarm around 00:30 and found “smoke in the building,” fire chief John Esposito told reporters.

“As a result, all three floors caught fire. [and] shoot through the roof,” Esposito said. “It was an outdoor operation, fire all over the building.”

According to Esposito, the roof partially collapsed on the top floor.

“This is an old building, which is starting to affect the structural stability of the building and make it dangerous,” Esposito said. “The stairs burned down, making it very dangerous for our members inside. So we decided to get everyone out of the building and then carry out external operations.”

39 FDNY units arrived on the scene with 168 firefighters and ambulance personnel.

By 6:35 a.m., the fire was finally contained.

The cause remains under investigation.

Monday’s two fires came a day after a 13-year-old boy died when flames engulfed his Brooklyn apartment.

Dillon Waldren-Dixon was found critically injured in a seven-story building on Snyder Avenue off East 25th Street in East Flatbush after a fire broke out on the fifth floor around 10:30 a.m. Sunday, according to the NYPD and FDNY. .

He was rushed to the Kings County Hospital Center where he was pronounced dead.

A 50-year-old woman and a 21-year-old man, also injured in the fire, were taken to the same hospital and are said to be in stable condition.