Firefighters battled a blaze on the 50th floor of Trump Tower in Manhattan, New York, on Saturday evening.
The New York Fire Department confirmed it had responded to a three-alarm fire, which broke out shortly before 6pm local time.
Footage posted on social media showed a vast amount of smoke billowing from multiple windows, with at least five fire engines spotted in Fifth Avenue.
The New York Police Department warned of traffic and road closures in the area, but there were no reported injuries.
President Donald Trump has an office and home at the 58-story building, but was in Washington at the time.
First Lady Melania Trump and their son Barron were also not in New York.
He tweeted to confirm that the blaze had been extinguished at around 6.45pm.
"Fire at Trump Tower is out," he wrote.
"Very confined (well built building). Firemen (and women) did a great job. THANK YOU!"
His son, Eric Trump, said the flames had broken out in a residential apartment and also thanked the fire and police departments for their response.
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"Thank you to the amazing men and women of the NYFD who extinguished a fire in a residential apartment at @TrumpTower," he tweeted.
"The @FDNY and @NYPD are truly some of the most incredible people anywhere!"