SEOUL, July 10 (UPI) -- Unionized workers at Samsung Electronics declared an "indefinite general strike" on Wednesday, calling for a wage increase and other benefits in what has become the largest labor action in the tech giant's 55-year history.

A three-day strike that began this week was scheduled to end on Wednesday. However, the National Samsung Electronics Union announced a change of plans, citing a lack of engagement from the company.

The union "confirmed that the company has no intention of dialogue even after the first general strike, and declared a second indefinite general strike from July 10," the NSEU said in a statement.

"We have confirmed that there will be a clear production line disruption, and the company will regret this decision," it said. "Management will eventually bend its knees and come to the negotiating table. We are confident in our victory."

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