AMARILLO, Texas (AP) - Two goose hunters inadvertently caused a security lock down in Texas at the nation’s only nuclear weapons assembly and disassembly plant.

Carson County Sheriff Tam Terry said plant employees on their way to work Friday saw two people in green camouflage carrying rifles about two miles south of the Pantex plant near Amarillo.

The employees notified plant officials, who called Terry’s office and asked for an investigation. Pantex officials then closed the plant for a couple hours.

Terry says the hunters turned out to be Department of Energy employees assigned to the plant. Both were found to be hunting legally in an area and not on plant property.