NEW YORK — A civil liberties group sued the U.S. government Monday, saying various agencies have failed to provide adequate documents related to what it calls the sweeping monitoring of Americans’ international communications.

The American Civil Liberties Union said in the lawsuit in federal court in Manhattan that its Freedom of Information Act requests since May had been largely ignored by the National Security Agency, the Central Intelligence Agency, the Department of Defense, the Department of Justice and the Department of State. It sought a court order to force the government to turn over information about the rules governing how it monitors the international calls and the emails of Americans.