The suspected cyberattack hit Kojima Industries Corporation, a company supplying plastic parts and electronic components to Toyota. Because of this, Toyota will suspend production at 28 lines at 14 plants on March 1 and will lose around 13,000 units in production volume.

No information was immediately available about who was behind the attack or the motive.

The attack comes just after Japan joined Western allies in clamping down on Russia due to its invasion of Ukraine, although it was not clear if the attack was at all related.

A spokesperson at Kojima Industries said it appeared to be some kind of cyberattack. A spokesperson from Toyota described it as a “supplier system failure.”

The incident might hurt Toyota’s efforts to return to full production following factory halts in January and February because of chip shortages and COVID-related disruptions.

Toyota, which has remained relatively resilient to supply chain snags through most of the pandemic, has been trying to ramp up production to make up for lost output and meet soaring global demand for cars.

The disruptions in the first two months of the year prompted Toyota to cut its output goal for the fiscal year through March to 8.5 million vehicles from a previous target of 9 million.

Toyota says it will resume all domestic production on March 2, 2022.