Brussels institutions have united to mark the first anniversary of September 11.

A joint statement from the European Union's council, commission and parliament marked the first anniversary of the terrorist attacks against the United States.

"Thousands of innocent people, many citizens of Europe among them, became victims of terrorism in New York, Washington and Pennsylvania on 11 September 2001. Many died in a selfless and heroic effort to save the lives of others," declared the EU leaders.

"It is with deep sorrow that we remember that tragic day. Our thoughts and prayers go to the bereaved families and friends in the United States and throughout the world who were stricken by the violence unleashed a year ago."

In a clear indication of transatlantic debate on the correct way to proceed against Iraq, European politicians recalled that last year's tragedy gave rise to "comprehensive" international cooperation in the war on terror.

"The terrorist attacks of 11 September have given rise to the most comprehensive international cooperation in decades. Countries all over the world have united in the common cause against the kind of cynical contempt for human lives that lies behind it."

Amid growing concern in EU capitals that the US is prepared to launch go-it-alone military action against Saddam Hussein, EU is using the anniversary to gently remind America and George W Bush of the "interdependence" of nation states.

"[The] unique solidarity must be sustained and supported, also through dialogue of cultures. September 11 underlined how inextricably intertwined our destinies are."

"The EU will not slacken its resolve to contribute to the international community's fight against terrorism. We will continue to stand side by side with the United States and all the other countries in this endeavour and seek to build a just international order that promotes peace and prosperity for all," said the Brussels statement.