A group of US lawmakers is asking the Treasury Department and State Department to sanction Israeli spyware firm NSO Group and three other foreign surveillance companies they say helped authoritarian governments commit human rights abuses. Their letter sent late Tuesday also asks for sanctions on top executives at NSO, the United Arab Emirates cybersecurity company DarkMatter, and European online bulk surveillance companies Nexa Technologies and Trovicor. The letter says the companies facilitated the "disappearance, torture and murder of human rights activists and journalists."