At least one person has been killed and several firefighters injured in a fire that broke out at the Trump Tower in New York.
Some 200 firefighters and members of the emergency services rushed to the scene on Fifth Avenue while the New York Police Department closed surrounding roads.
The New York City Fire Department (FDNY) said an occupant of the apartment had died after the unit was "entirely" engulfed with flames.
The blaze broke out shortly before 6pm local time (11pm GMT), filling floors of the 58-storey building with a "considerable" amount of smoke.
Around 45 minutes later - before the fatality had been publicly announced - Mr Trump took to Twitter to praise firefighters for their response, saying they had extinguished the blaze.
The billionaire, who made his fortune in property, also attributed the construction of the tower to the fire's limited spread.
During the incident, Mr Trump was in Washington DC, where he was seen at the luxury Trump International Hotel.
As well as his luxury residence, Trump Tower also contains offices of the Trump family business.
His son, Eric Trump, tweeted: "Thank you to the amazing men and women of the NYFD who extinguished a fire in a residential apartment at @TrumpTower. The @FDNY and @NYPD are truly some of the most incredible people anywhere!"
Opened in 1983, the mixed-use skyscraper on Fifth Avenue is a jewel in The Trump Organisation's real estate portfolio that includes high-end properties, hotels and golf courses.