Google will not renew a contract to do artificial intelligence work for the US Pentagon, company sources say.
The decision follows strong opposition in the technology giant's workforce.
A number of Google employees resigned and thousands of others signed a protest petition against taking part in the Pentagon project, known as Maven.
They feared it was the first step towards using artificial intelligence for lethal purposes. There has been no official statement from Google.
According to company sources, top executive Diane Greene told staff on Friday there would be no follow-up after the current contract expired next March.
But Kate Conger, a journalist for the technology news website Gizmodo, told the BBC that Google had not cancelled Project Maven and did not appear to have ruled out future work with the military.
The contract is reported to be worth less than $10m (£7.5m) to Google but could potentially lead to more extensive cooperation with the Pentagon.