Firefighters responded to an early morning fire at Trump Tower in midtown Manhattan, with two injuries reported, one of them serious, the New York Fire Department said on Monday.
US President Donald Trump was in Washington at the time.
The fire - described by Eric Trump as a small electrical one - was believed under control and no injuries were reported, NBC News reported on Twitter.
There was a small electrical fire in a cooling tower on the roof of Trump Tower. The New York Fire Department was here within minutes and did an incredible job. The men and women of the #FDNY are true heroes and deserve our most sincere thanks and praise! https://t.co/xuTmq1GBbj
— Eric Trump (@EricTrump) January 8, 2018
CBS News said the fire broke out shortly before 7am EST (noon GMT) near the roof of the 68-storey structure, which had been Trump's primary residence before his election victory and inauguration nearly a year ago.
It posted a picture of firefighters on the rooftop with smoke pouring from a portion of it.