"We are very concerned, especially since we know that Iran is seeking to acquire the nuclear weapon," government spokesman Avi Pazner told AFP.

"We informed our American and European friends of our concern. Everything must be done to prevent Iran from acquiring the nuclear weapon. The combination of the Shahab-3 and the nuclear weapon be a very serious threat on the stability of the region," he added.

Iran earlier confirmed it had conducted a final test of its Shahab-3, a medium-range ballistic missile which has a range of 1,300 kilometersmiles) and has the reported capability to carry a warhead of between 700 and 1,000 kilogrammes.

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