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.
Picture of Assault Suspect Released
Police also looking for 3 others after man left with life threatening injuries
Premier Fumes Over Gas Price Increase
Doug Ford pointed out there's been no change in places like Chicago or Minnesota
Niagara Falls Man Charged with Fraud
Police say it was concerning construction jobs that didn't get done, after payment
Arrests Made in Armed Residential Robbery
Two men face a number of charges each after the robbery in Niagara Falls
Fort Erie Man Wins Lottery
Scott Serada is bringing home $100,000 courtesy of Instant Gold Pursuit
Councillor Disputes Speed Camera Claims
One claim he addressed is about speed camera company having control of tickets
Gas Prices to Skyrocket in Niagara
Gas analyst says it'll go up 14-cents overnight, largely blaming switch from winter to summer gas
Gord Singleton to be Honoured Tonight
Niagara Falls will be lit up in the Olympic ring colours