Officials with Canada Post say an outbreak of COVID-19 has hit their massive facility.
They say 121 workers have tested positive since the start of the new year.
About 4,500 people work at the Dixie Road location.
A spokesman says public health officials have indicated most of the cases came from the broader community.
2 Niagara men arrested by Toronto Police
Accessed rooftop to take pics for social media
Niagara Parks Tree Planting Day - Sat. Oct. 24
The free event takes place from 10AM-Noon
Gov't Wastes Too Much Money: Candidate
Gov't Pressured to Investigate Whale Deaths
Niagara Falls MPP is asking the government
Niagara Falls Receives Payment for Casinos
OLG pays for hosting 2 casinos
Niagara Falls Man Charged with Child Porn
The investigation began in August
Toronto Man Charged with Drug Trafficking
Respecting Taxpayers, Douglas Memorial Candidate's Concerns