The Saskatchewan Junior Hockey League (SJHL) confirmed the hack and said it worked with the social media website and the team to rectify the problem.
Disrespectful and racist content tweeted out Wednesday via @HumboldtBroncos has already been removed.
During the online ordeal, the hacker attempted to acquire Snapchat followers.
The small Saskatchewan city is still healing from the Humboldt Broncos bus crash last year.
WATCH: Leadership through crisis theme of Kevin Garinger speech (April 2019)
The collision between the junior A team’s bus and a semi-trailer on April 6, 2018, claimed the lives of 16 players and staff near Tisdale. Thirteen others were injured.
Humboldt is approximately 105 kilometres east of Saskatoon.