They were left to guess the type of Israeli warheads being used. I is a declassified DIA photograph. It is generally believed that Israel has, or had, about 50-100 of the Jericho I missiles. Certain details of the Jericho I remain a mystery. There is considerable variation in the range assessed.
More recent accounts give different numbers.
Other sources give ranges of 500 to 750 kilometers. In 1985, a press report appeared that claimed Israel was developing a new generation Jericho with a range of 400 miles and significantly improved accuracy. 18 Public information about the system began to grow when the Israelis initiated a series of test launches into the Mediterranean. According to one source, there were seven launches between May 1987 and March 1992. In 1991, following the first Iraq's Al Husayn missile attacks on Israel, the Bush Administration was worried that Israel might respond using ground forces or air strikes.