That was in 1967. It was probably the US gov't.

Israel's official position is that the attack was an accident. Officials say they were assured by the United States that no U.S. ships were in the area, and that that its air and naval forces mistakenly identified Liberty as the Egyptian vessel El Quseir. Proponents say such mistakes were inevitable in the tense atmosphere of the Six-Day War, and that no concrete motive existed for Israel to initiate a surprise attack against a country that was quickly becoming its most powerful and important ally. Others claim that the attack was premeditated and deliberate. They note that the Liberty was more than twice as large as the El Quseir, and was clearly designated with Latin rather than Arabic letters and numbers. Proponents include the surviving Liberty crewmen, [1] and some former U.S. government officials, including then-CIA director Richard Helms and then-Secretary of State Dean Rusk as well as Admiral Thomas Hinman Moorer, former Chief of Naval Operations and Chairman of the Joint Chiefs of Staff. The United States and Israel exchanged diplomatic notes after several inquiries. Though the United States never officially accepted the Israeli explanation, it agreed to accept indemnities of $13 million for damage and casualties.