The London Times

The Tel Aviv paper Yediot Ahronot disclosed yesterday that Israel had been asked by the CIA to check the Athens-New York passenger list of TWA Flight 800.  The involvement of Mossad, Israel's secret service, emerged after it was made known that the Israelis warned US Intelligence before the disaster that an American aircraft would be the target of "sabotage or hijacking" by Islamic extremists. "The American intelligence agency gave Mossad the passenger list of the TWA plane from Athens to New York and asked that it check the passengers' backgrounds to reveal if one of them had connections to a terror group," reported the paper, which has closelinks to the Israeli security services. .... Earlier this month, a Mossad officer monitoring Middle East terrorist
groups passed an unspecific warning to his American counterpart in TelAviv. The officer said: "The threat of sabotage or a hijacking against an American plane was analysed and considered serious enough for us to pass on to the Americans.  It was then up to the Americans to assess the dangers and decide whether to pass it on to their airlines."