AMMAN, JORDAN, SEPT. 17 -- A conference of pro-Iraqi Arab movements wound up a three-day meeting today calling on Arabs to use all available weapons, including suicide car-bomb attacks, to hit the United States if it launches a war against Baghdad.

The radical Arabs said in a statement that their first objective would be "to strike against American interests everywhere and by all means, at the same moment an American military attack is launched against Iraq."

"We have striking examples of heroes who turned their bodies into bombs that horrified the aggressors and forced them to flee in darkness as happened to the American Marines in Beirut in 1983," said Ibrahim Kharraz of the Libyan People's Congress.

The gathering included some of the most hard-line Palestinian leaders, including George Habash of the Popular Front for the Liberation of Palestine and George Hawatmeh of the Democratic Front for the Liberation of Palestine. The two men had not visited Jordan in 20 years, since Jordanian troops defeated Palestinian guerrillas in the war many Palestinians remember as Black September.

The conference, held at Jordan's Royal Hall of Culture, illustrated the unlikely alliance that has developed between Jordanian leader King Hussein and some of his old enemies, such as Habash and Hawatmeh. The king sponsored the gathering and was supposed to come to the opening session, but he instead sent Parliamentary Speaker Suleiman Arar to represent him. Hussein did receive Habash and Hawatmeh Sunday, however.

The communique issued this afternoon after three days of deliberations expressed support for efforts aimed at averting a "catastrophic military confrontation in the {Persian} Gulf" and pledged to break the U.S.-led embargo of Iraq.

The conference, organized by the two-month-old Jordan Arab National Democratic Coalition, was the first of its kind following Jordan's political liberalization begun with legislative elections last year. It was said to have included representatives of 150 nationalist and leftist Arab parties.

In interviews, Habash and Hawatmeh hinted at their desire to return from their current bases in Syria to Jordan. Each of their parties holds one seat in the Jordanian legislature.

But a former Jordanian official said the two men's symbolic visit would not be followed by a more formal welcome.