TORONTO (AP) — Canada and the US have agreed to extend their agreement to keep their border closed to non-essential travel to July 21 during the coronavirus pandemic.

Canadian Prime Minister Justin Trudeau said Tuesday’s agreement extends the closure by another 30 days. The restrictions were announced on March 18 and were extended in April and May.

“This is a decision that will protect people on both side of the border as we continue to fight COVID-19,” Trudeau said.

Many Canadians fear a reopening.

Americans who are returning to the U.S. and Canadians who are returning to Canada are exempted from the border closure. Immediate family members of Canadians are also allowed entry into Canada, but must quarantine for 14 days.

And essential cross-border workers like healthcare professionals, airline crews and truck drivers are still permitted to cross. Truck drivers are critical as they move food and medical goods in both directions. Much of Canada’s food supply comes from or via the U.S.