According to the journalist Steve Coll, Yousef mailed letters to various New York newspapers just before the attack, in which he claimed he belonged to "Liberation Army, Fifth Battalion".
根据记者史蒂夫·Coll的记载，尤塞夫在袭击之前曾向多家纽约的报社寄了信件，在信中，他声明自己属于“以色列军队第五营”。