Toronto Public Health (TPH) has confirmed 13 cases of COVID-19 among staff members at a Toronto quarantine hotel.

Officials from the agency have been investigating an outbreak at the Crowne Plaza Toronto Airport hotel for several days now. The health agency released a statement on Tuesday afternoon saying the risk to the general public "remains low" since the hotel is just for quarantining and not for general public use.

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"As of this morning, there are 13 confirmed cases of COVID-19 in staff members at the hotel," officials said in the statement. "TPH has provided instructions to staff members who have tested positive, and those who are considered a close contact."

The Crowne Plaza is one of 20 hotels used for quarantining international travellers landing in Toronto, and TPH says it found a "strong adherence" to public health measures in on-site inspections Tuesday morning.

"As this facility provides an essential service to keep Torontonians safe, it will not be fully closed," said TPH, adding that the agency would notify the public if the hotel is partially closed.