The Toronto Maple Leafs are pausing team activities through next Sunday because of the coronavirus, the NHL announced.

The league said that a decision will be made in the coming days on when Toronto's facilities will open again.

The move comes as the league postponed 12 games involving U.S. teams playing Canadian-based teams from Monday to Thursday, citing concern about "the fluid nature of federal travel restrictions."

Beginning this week, the NHL introduced enhanced protocols through at least Jan. 7 that include daily COVID-19 testing, social distancing at team facilities and restrictions on where players can go outside of the rink, hotel or home.

The NHL has not mandated a booster vaccine for players, though the league has recommended it.