Ultra Orthodox Jews in Jerusalem have protested outside the offices of an American company over the plant operating on the Sabbath, a day of rest.
Intel, the world's biggest maker of computer chips, ringed its offices with barbed wire before the protest, but there were no reports of violence, the BBC reports.
Ultra Orthodox Jews have recently held a series of such protests in Israel.
More than 1000 people took part in the rally. It was staged after talks between Intel and the ultra Orthodox Jewish community broke down earlier this week.
Intel has been operating on Saturdays for years and the company defends the policy.