Four study groups closed after five students from four schools tested positive for the coronavirus in Delmenhorst, in northern Germany.
Premises of the affected schools were seen empty and quiet on Tuesday.
The positive tests occurred after a recent coronavirus outbreak in the Geestland slaughterhouse in Wildeshausen, which is some 25 km (15.5 miles) away. Employees and their families have to be quarantined until July 10.
Due to the positive coronavirus tests in the schools, the study groups have been shut down. All students and teaching staff from said groups were required to quarantine.
In total, the measures reportedly affected over 200 people.
Meanwhile, testing started for around 200 employees out of 1,000 at the Koenecke meat factory in Delmenhorst, on Tuesday. Testing tents were seen being set up outside the factory, with people in protective gear walking around.
The slaughterhouse belongs to the Toennis group, which already suffered a mass coronavirus outbreak in the Guetersloh district.