Workers at a Birmingham factory run by Japanese manufacturing giant Fujitsu are to stage a 24-hour strike in a row over jobs.
The Communication Workers' Union said up to 150 workers at the plant will walk out on June 9 in protest against plans to move work to the United States.
Deputy general secretary Jeannie Drake said: "We are bitterly disappointed that, despite a great deal of time invested in negotiation, the premise for a deal with the company has not been found.
"Talks will continue, but manufacturing workers in Birmingham will be escalating this campaign through strike action."
National official Grace Mitchell said: "In the circumstances, the members have been as patient as they can be.
"Strike action is a last resort for workers in this plant who have been loyal to the company over many years. We offered an 11th-hour solution which would have avoided the need for industrial action, but Fujitsu was unable to commit enough in negotiations.
"We will continue to work tirelessly to achieve a deal which keeps manufacturing jobs in Birmingham."