COLUMBUS, Ind. (From news reports) --The Columbus WestRock packaging container plant that employs about 100 people is scheduled to close.

An internal company memorandum provided Tuesday morning confirms the plant closure but gives no date.

Sources said WestRock gathered employees from all three shifts on Tuesday morning to share news that the plant would be closing in October.

A letter dated Aug. 15 that was provided to employees said layoffs were expected to occur on Oct. 15. That would conform with federal law that requires 60 days' notice of plant closings for facilities of WestRock's size.

WestRock employees are represented by United Steelworkers Local 701 and a majority of the workforce are members of the union, workers said.

The Columbus facility originally was opened by Weyerhaeuser Inc. in 1968 and reached full production capacity in 1969. It operated under numerous names over the years.