SEOUL, South Korea (AP) — Unionized workers at Samsung Electronics declared an indefinite strike Wednesday to pressure South Korea’s biggest company to accept their calls for higher pays and other benefits.

Thousands of members of the National Samsung Electronics Union launched a temporary, three-day strike on Monday. But the union said Wednesday that it was announcing an indefinite strike, accusing the management of being unwilling to negotiate. Samsung Electronics says there have been no disruptions to production.

Samsung Electronics will ensure no disruptions occur in the production lines,” a Samsung statement said. “The company remains committed to engaging in good faith negotiations with the union.”

However, in a statement posted on its website, the union said it has engaged in unspecified disruptions on the company’s production lines to get management to eventually come to the negotiating table if the strikes continue.

“We are confident of our victory,” the union statement said.