The French Education Minister, Jean-Michel Blanquer confirmed this on Monday.
Under the government’s lockdown exit plan, 40,000 primary schools and kindergartens have reopened.
France began easing the two-month lockdown restrictions on May 11 with the reopening of schools in less affected areas by the Coronavirus.
Secondary schools are scheduled to resume operations on Monday, while high schools are to remain closed until June.
“Seventy coronavirus cases have been detected in the 40,000 schools that have reopened since May 11 and received 1.4 million school children across the country,” Blanquer said.
He mentioned that the new cases were registered in about 50 schools, which has now been closed again.
The closures took place in Mayenne, Finistere, Cantal, Haute-Garonne, Indre-et-Loire, Herault and Nice, NAN reports.
Blanquer , however, added that educational institutions in “red zone’’ regions would wait until at least the end of May before knowing the date of their possible resumption.
As of Monday, France has recorded 179,693 COVID-19 cases, the sixth highest number in the world, with its death toll at 28,111.
AFP