An Israeli counterterrorism law mandates jail terms for members of groups designated as terrorist organizations, as well as for people who express support for these groups.
Israel has often targeted rights campaigners in the past: barring them from travel, raiding their offices, or deporting them. But international rights groups said the designations on Friday were a watershed.
In a joint statement, Amnesty and H.R.W. said: “This decision is an alarming escalation that threatens to shut down the work of Palestine’s most prominent civil society organizations.”
The statement added: “They represent the best of global civil society. We stand with them in challenging this outrageous decision.”
A spokesman for the U.S. State Department, Ned Price, said in a statement that the United States had not been given advance notice about the designations and would ask Israel to clarify its reasoning.
Mr. Price said: “The U.S. believes respect for human rights, fundamental freedoms and a strong civil society are critically important to responsible and responsive governance.”
He added: “We would refer you to the Government of Israel for an explanation of their rationale for making these designations.”