New documents obtained by WRAL News show a drop in Bud Light sales forced a glass plant in Wilson to cut down bottle production starting in May.

With Bud Light’s huge drop in sales, last week, the plant’s owner, the Ardagh group, announced it would be shutting down the factory in Mid-July, laying off close to 400 employees.

In a statement last Thursday, the company told the Ruston leader in Lousiana that the Wilson plant is closing, along with the Ruston plant, which employs 245 people. The statement doesn’t identify a specific reason for the closures, only calling them part of a “Multi-year Performance Optimization Program.”

“Since April, we’ve had a couple of machines down,” said James Munhall, Journeyman Machine Repair Mechanic. “It was, of course, being pointed towards the Bud Light situation.”