The Los Angeles studio were Dancing with the Stars is shot was evacuated Friday night after a mysterious letter containing a powdery substance was delivered.
None of the stars of the show were on scene at the time, RadarOnline.com has confirmed, but staffers took quick action nonetheless.
"An envelope containing an unknown substance was delivered to the Dancing with the Stars production office on Friday evening," an ABC rep said in a statement. "Security and the Los Angeles Fire Department and the Los Angeles Police Department were immediately notified. Measures were taken to secure the area and ensure the safety of personnel."
Bristol Palin, Jennifer Grey and Kyle Massey are the three stars who will be competing in the DWTS finale Monday night, and Bristol has been surrounded by controversy from her first appearance.
Many fans believe she only made it to the finals because of highly organized voting on the part of supporters of her mother, Sarah Palin. But whether Bristol or one of her competitors -- Jennifer or Kyle -- was the intended target of the scare letter, law enforcement isn't saying.
- ‘RHONJ’ Custody Battle: Amber Marchese’s Husband Accuses Ex-Wife Of Trying To Have Son ‘Falsely Diagnosed With Autism’ In Explosive Court Documents
- Housewives Legal Bust! Richard Wakile Loses Court Case, Ordered To Pay Outstanding Debt
- Loser Landlords? Inside Joe And Melissa Gorga's Bitter Feud With Tenant
Fortunately for all, the "unknown substance" turned out to be talcum powder but the threat is still being investigated and security for all the stars has been beefed up.
VIDEO: Bristol Palin & The Situation Team Up For Safe Sex PSA