Air Canada suspended plans to restart operations Sunday after the union representing 10,000 flight attendants said it will defy a return to work order.

Air Canada has called off its plans to resume flights on Sunday after the union representing 10,000 flight attendants announced it would defy a return-to-work order.

The union said no, setting up an almost unprecedented standoff with the Canadian government, which had requested the back-to-work order.

A t least seven people, including two children, were killed by a Russian drone strike in the northeastern Ukrainian city of Kharkiv on Sunday night, according to local officials. Serhiy Bolvinov, the head of Kharkiv National Police's investigations unit, said in a post to Facebook that five Shahed strike drones hit an apartment building at dawn.