New York City schools will remain open Monday, as the city's seven-day test positivity rate continues to remain under 3 percent. The 7-day average test positivity rate is 2.57 percent Bill Neidhardt, a spokesperson for New York City Mayor Bill de Blasio, said in a statement Sunday morning.

If the test positivity rate reached or exceeded 3 percent, city schools could be closed and students would move to all -remote learning, the mayor has previously said.

"Today, schools currently remain open, based on today's 7-day test positivity rate. Again, we expect the daily test positivity to backfill and increase as more tests results are entered into the system, but do not expect that increase to push today's 7-day average to percent," Neidhardt said in an email. 

The mayor shared his gratitude on Twitter, saying in part, "Thankfully, schools will remain open on Monday, but we have to keep fighting back with everything we've got."

In addition to the test positivity rate, at least 937 positive cases of COVID-19 have been reported Sunday and 117 people have been admitted to hospitals across the city, the email said.

(With input from agencies)