April 30 (Reuters) - A group of workers at Alphabet

Inc's ( GOOG ) Google have filed a complaint with a U.S. labor

board claiming the tech company unlawfully fired them for

protesting its cloud contract with the Israeli government.

The complaint was filed late Monday with the U.S. National

Labor Relations Board (NLRB), according to No Tech For

Apartheid, a group affiliated with some of the workers. The

group said the complaint alleges that by firing the workers,

Google interfered with their rights under U.S. labor law to

advocate for better working conditions.

Reuters could not immediately obtain a copy of the

complaint. Google did not immediately respond to a request for

comment.

Google this month said it had fired 28 employees who

disrupted work at unspecified office locations while protesting

Project Nimbus, a $1.2 billion contract jointly awarded to

Google and Amazon.com ( AMZN ) to supply the Israeli government

with cloud services.

The workers claim the project supports Israel's development

of military tools. Google has said the Nimbus contract "is not

directed at highly sensitive, classified, or military workloads

relevant to weapons or intelligence services."

Zelda Montes, a former Google employee who was arrested

during a protest of Project Nimbus, said in a statement that

Google fired workers to suppress organizing and send a message

to its workforce that dissent would not be tolerated.

"Google is attempting to instill fear in employees," Montes

said.

The workers in the NLRB complaint are seeking to be

reinstated to their jobs with back pay, and a statement from

Google that it will not violate workers' rights to organize.

The NLRB general counsel, which acts as a prosecutor,

reviews complaints and attempts to settle claims it finds to

have merit. If that fails, the general counsel can pursue cases

before administrative judges and a five-member board appointed

by the U.S. president.