The Canadian government said Wednesday it is temporarily grounding Boeing 737 Max 8 and Max 9 planes and barring them from the country's airspace, joining dozens of nations suspending service after the second fatal crash of the planes in less than five months.

"The advice the experts have provided is based on the information they have been receiving; the requirements for new procedures and training for Boeing 737 MAX 8 and 9 flight crews they have already put in place; and the latest information available from the incidents," Canadian Transport Minister Marc Garneau said in a statement.

Canada's decision made the United States a notable holdout for allowing the Boeing planes to fly as investigators seek clues as to what brought down an Ethiopian Airlines 737 Max 8 shortly after takeoff on Sunday, killing all 157 people on board. The Federal Aviation Administration on Tuesday reiterated its stance on the plane, saying it saw no reason to order the jets be taken out of service.

Canada's transportation ministry said it's immediately restricting all Boeing 737 MAX 8 and 9 aircraft "from arriving, departing, or overflying Canadian airspace."