East Lyme — Four additional COVID-19 cases were reported to the town school district Friday, the superintendent said in a notice to staff, parents and guardians.

Two of the cases were specific to East Lyme Middle School and the other two were specific to Lillie B. Haynes School, Superintendent Jeffrey Newton said in the notice. Those infected were instructed to stay home in self-isolation, he said.

The affected individuals last attended the middle school on Nov. 10 and Lillie B. Haynes on Monday, Newton said. He did not say whether these people were students or staff members.

Contact tracing was conducted and anyone deemed a “close contact” with any of these individuals will be contacted by school or health officials, Newton said.

East Lyme Middle School already had switched to remote learning, which will continue until Nov. 30. Lillie B. Haynes School will remain open for all staff and students on Monday, Nov. 23, Newton said.