Trump Tower on fire in Midtown Manhattan

Crews were responding to a one-alarm fire at Trump Tower in New York Monday morning.

A police source told NBC News it was an electrical fire on the rooftop of Donald Trump's flagship building in Midtown Manhattan, and said there were no injuries or evacuations.

The president was not in the building when the fire erupted.

Fire trucks could be seen outside of the building just after 7 a.m. as smoke wafted off the roof. Witnesses posting photos on social media said around 7:30 a.m. that the fire appeared to be lessening.