The decision was made on Tuesday and staff at the broadcaster were notified by an email from Katarina Schulz, acting news director for Swedish Radio News.
Schulz says the media outlet's decision stems from the fact that the assailant - 21-year-old Anton Lundin Pettersson - had clear political motives in committing the crime as well as that the killings have caused a sense of worry and fear among the public.
"I think you can define what happened as an act of terror" Schulz tells Radio Sweden.
Schulz adds that there are many different ways to describe what took place in Trollhättan on October 22 and that calling it a terrorist attack is just one way to characterize it.
The attack left two people dead, one teaching assistant and one student. Swedish police have confirmed that Pettersson had "racist motives" and that stabbings were a "hate crime".
After Trollhättan: Schools mourn and rethink security5:14 min 5:14 min
Police: School stabbing was racist hate crime1:13 min 1:13 min
Trollhättan school stabbing as it happened4:49 min 4:49 min