The United States said it had restricted its employees in Israel and their family members from personal travel outside the greater Tel Aviv, Jerusalem and Be’er Sheva areas amid Iran’s threats to retaliate against its regional adversary, Reuters reports.

“Out of an abundance of caution, US government employees and their family members are restricted from personal travel outside the greater Tel Aviv (including Herzliya, Netanya, and Even Yehuda), Jerusalem, and Be’er Sheva areas until further notice,” the US embassy said in a security alert, opens new tab on its website. “US government personnel are authorized to transit between these three areas for personal travel.”

Washington has a policy of informing all American citizens via such warnings when it updates security measures for its personnel in a country.