Ford Motor Co. said a battery fire in an F-150 Lightning electric pickup truck stored on company property was the cause of a production halt that began early last week.

The auto maker said Wednesday evening that the truck was in a holding lot when it caught fire during a pre-delivery quality check, and spread to a nearby truck. “We have no reason to believe F-150 Lightnings already in customers’ hands are affected by this issue,” a company spokeswoman said.