Another two people have tested positive for COVID-19 at St. Martin Catholic Elementary in Smithville.
But Niagara Catholic says they're not linked to the outbreak that was declared on Thursday.
Both of the newly infected individuals are self-isolating and contact tracing is underway.
Public Health says there was no risk of exposure for one of the cases.
The principal has sent a letter to all staff and students to notify them of the situation.
Over $40,000 Raised for Day of Giving
Turkstra and Credit Union big contributors, but also individuals raised over $14,000 to help people who have nothing after floods
Police Concerned After Man Released
London police say Connor Bennett is now in Thorold
Body Found During Home Demolition
Police believe Brenda LeBlanc was murdered
2 Men Wanted After Lincoln Break In
Police say this happened on Cherrywood Drive
Boy Severely Hurt in Lundy's Collision
Hamilton police helped the NRP arrest a driver for impaired driving
Fed/Prov Volunteers Help Cleanup
City of St. Catharines says Team Rubicon volunteers are assessing damage
Police Investigating Fatal Wainfleet Crash
They say a motorcycle driver lost control on Golf Course Road in Wainfleet
Man Arrested in Relation to Child Porn
Police say Port Colborne man didn't comply with release order, he's been active in online tutor program