Demolition crews began final work Thursday to take down a derelict building on the Midtown Anchorage skyline, completing several months of work to remove it.

The skeleton of the Northern Lights Hotel was being collapsed Thursday afternoon according to KTVA viewer Vincent Ryan, who said the work was "spectacular and loud."

The hotel, which spent more than a decade unoccupied but was recently occupied by squatters, has been undergoing demolition since February.

Construction crews with contractor Central Environmental, Inc. began demolition on the building Thursday morning, following asbestos abatement removal work. Each of the blue structure beams had to be cleaned before the building could be torn down.

Work to demolish the Northern Lights Hotel entered its final stage Thursday afternoon, with at least a third of the building taken down. (Heather Hintze/KTVA)

The first section of the building was demolished just after 7 a.m. Thursday. A worker at the scene said he wasn’t sure how long the final work was supposed to take, but by Thursday afternoon crews were at least a third of the way through the job.

All the beams and other materials will get separated for recycling.

Anchorage police spokeswoman Renee Oistad said no road closures were reported in the area of the hotel, along Northern Lights Boulevard west of C Street.

Heather Hintze contributed information to this story.