While much of the city was asleep, Toronto Fire Services rushed to the CN Tower put out a fire in the broadcasting antenna mast early this morning.

The fire, which started around 4 a.m., has since been extinguished and as CBC News writes, no injuries were reported in this incident. The cause of the fire is still unclear.

We are currently at the CN Tower dealing with a fire in the antenna mast some local media may not be broadcasting pic.twitter.com/tLNVxoJEHu

— Toronto Fire Service (@Toronto_Fire) August 16, 2017

The broadcasting antenna is situated above the tower's observation deck and restaurant.

Fire @TourCNTower is out pic.twitter.com/j0ZXof1ZyS

— Toronto Fire Service (@Toronto_Fire) August 16, 2017

According to the Toronto Star, four crews were up in the antenna fighting the fire, which was out by approximately 7 a.m.

Fire is out @TourCNTower crews coming down @Toronto_Fire pic.twitter.com/gh3eg6addb

— Toronto Fire Service (@Toronto_Fire) August 16, 2017

The CN Tower is open to the public and it's business as usual there today.