Ford said on Tuesday it was postponing its plan to restart production at its North American plants due to safety concerns for its workers amid the coronavirus pandemic.

To generate cash, the No. 2 U.S. automaker had said last week it was poised to restart production at some plants in North America as early as April 6, bringing back such profitable vehicles as its top-selling F-150 full-sized pickup, the Transit commercial van and SUVs.