The Arab League's secretary-general said on Sunday that Iranian attacks on several member states were "reckless", urging Tehran to reverse what he called a "massive strategic mistake".
In response to a US-Israeli air campaign that began on February 28, Iran has launched retaliatory strikes on Israel and Gulf states, which house American bases.
Addressing an emergency videoconference of Arab foreign ministers from Cairo, Ahmed Aboul Gheit said the strikes "cannot be justified under any pretext or excuse", accusing Tehran of responding to Gulf peace efforts with "treacherous rockets and drone attacks".
He said Arab states were "not parties to the ongoing war" and had made it clear they would not allow "their territory or airspace to be used" to launch attacks.
Several Arab countries, including Oman -- until recently the mediator of US-Iran nuclear talks -- as well as Qatar and Egypt, had put in "earnest, sincere and serious efforts to spare the entire region, including Iran, the ravages of war", Aboul Gheit added.