CHAPEL HILL, NC - AUGUST 18: Student-athletes ride through the campus of the University of North Carolina at Chapel Hill on August 18, 2020 in Chapel Hill, North Carolina.The school halted in-person classes and reverted back to online courses after a rise in the number of COVID-19 cases over the past week. (Photo by Melissa Sue Gerrits/Getty Images)

There have been students placed in isolation at the University of North Carolina Chapel Hill due to a large spread of covid cases in a dormitory on campus.

The university said Saturday that a cluster of at least five cases has been identified at Avery Residence Hall.

The announcement comes a day after university officials said that unvaccinated students will now have to be tested twice weekly. The initial requirement was once a week.

Earlier this month, university officials announced a cluster of cases connected to an event at the school of pharmacy.