Photographs and video of the building seemed to show that the fire, which was reported just before 7 p.m., appeared to be under control.
Authorities said firefighters rescued 12 people from the building and four people were in hospital in a critical condition.
"We may lose others as well", he said.
Activity from police and fire department officers cut through what otherwise was a generally quiet residential neighborhood that sits a short distance from the Bronx Zoo, St. Barnabas Hospital and Fordham University.
Excluding the September 11 attacks, it was the worst fire in the city since 87 people were killed at a social club fire in the Bronx in 1990.
The fire commissioner said he's unsure whether all the smoke detectors were working in the building.
The fire spread up the stairs and cut off exit points for people on the upper floors. At least 160 firefighters converged on the scene to help battle the flames.
Mr De Blasio later tweeted his thanks to the New York Fire Department "for their bravery and quick action".
The fire started Thursday night around the time that many residents of the 25-unit, five-story building would have been eating dinner. "We won't tell you anything more about it other than they range in ages from 1 to over 50".
Among the victims are a family of four - 2-year-old Kylie Francis, 7-year-old Charmela Francis, 19-year-old Shantay Young and 37-year-old Karen Francis.
"I got scared and freaked out because I thought I was going to fall off the fire escape, but I tried my best", Martinez said.
Still, Nigro said there was nothing structural about the building that contributed to the fire. "I couldn't carry the rest of them", Reyes told the Times.
"I've been calling his phone, it's ringing, but nobody picks up", Bredu said.
Diallo said the apartment building has tenants who hail from all over the world. Red Cross representatives stationed on the block offered blankets and smoke alarm installations to residents.
And in 2007, a fire in the Bronx killed nine children and an adult.
Friday morning Mayor de Blasio said the search for answers in Thursday night's fire is ongoing.
Mensah lived with friends of his father - a married couple and their four children.
The robbery was reported shortly after 12:45 p.m.at a gas station on the 600 block of South 14th Street on December 28. Police say the man who robbed a Port Huron hotel may have robbed businesses in three metro Detroit counties.
The match was immediately stopped and a stretcher was brought out; however, she did manage to walk out with some assistance. According to PWInsider .com, Paige had her back to Banks and it appeared she didn't realize the kick was coming.
Tiger Zinda Hai (Rs 114.93 crore ) beat Raees (Rs 93.24 crore ) to become the highest Bollywood opening weekend grosser of 2017. Five of his films have crosses the Rs 200 crore mark while two have touched the Rs 300 crore milestone.
Instagram has launched one of the biggest changes yet to its feed. "You can choose to temporarily hide Recommended for You posts". The new feature has gone live quietly but it's not really the first time that Instagram is toying with the idea.
Temperatures will fall to near 12 by morning as northerly winds increase, producing wind chills near zero by 7 AM Saturday . High pressure will continue sinking south from Canada Friday night, producing overnight lows between -20 and -30 degrees.
May you discover the peace in the following life that you merited while you were here. "Her heart was bigger than the world". In a series of tweets after the meeting, Erica Garner again stressed that she wanted to see progress on the investigation.
The thirty-second clip ends with his bars from the first verse stating the obvious "Nobody wins when the family feuds ". The religious scene is interspersed with flashes of a couple having sex - most likely a reference to his cheating.
Meanwhile, there have been four reports of underground frozen pipes, which the City says is normal for a Winnipeg winter. Any residents with questions regarding frozen pipes can call the Binghamton Public Works Dispatch at 607-772-7020.
They then headed straight to a private villa in Cabo that includes 360-degree views of the ocean and an infinity pool. At the time, sources said police performed a welfare check on Mandy after being contacted by a family member.
Tim Cook gets a 46 percent pay raise in 2017
Vice President Al Gore, and former Northrop Grumman CEO Ron Sugar, are up for election to remain in the board another year. Cook owns 560,000 shares awarded to him in 2011 and vested in fiscal 2017 year which was valued at $89.2 million.
The world's rich become $1 trillion richer
The fortune of French telecommunications billionaire Patrick Drahi fell US$4.1 billion to US$6.3 billion, a 39 per cent drop. With wealth surging to new highs, billionaires may quickly learn that a billion dollars doesn't buy what it used to.