The terminated Google workers who staged protests at two company offices earlier this month over the company’s contract with Israel have filed a formal complaint with the national labor board alleging the company violated their labor rights by firing them.

At Google, employees staged sit-in protests at the company's Sunnyvale, California and New York campuses on April 16 to protest the company's $1.2 billion cloud-computing contract, called Project Nimbus, with the Israeli government. The company responded by firing 28 employees for their involvement, according to a memo obtained by The Verge.

Google fired at least 20 more workers in the aftermath of protests over technology the company is supplying the Israeli government amid the Gaza war, bringing the total number of terminated staff to more than 50, a group representing the workers said.