Nissan Motor Co. said Tuesday it is willing to postpone until June 2021 the closure of its Barcelona plants and talk about "everything" with unions, but insisted it sees no alternative to the factories shutting.

The three Barcelona plants, which employ around 3,000 workers, were originally due to close by December this year.

The postponement depends on reaching a deal with unions before July 30 or early August that would imply resuming production, which was stopped in May, and agreeing on the compensation that workers would receive once the plants close, a top Nissan executive told reporters.