German police are searching for ten men they believe provided support for a foiled plot to attack US installations in the country.
Yesterday, Germany said it had arrested three men - two Germans and one Turk - who were on the verge of launching "massive bomb attacks" more deadly than the Madrid and London bombings of recent years.
August Hanning, state secretary in the Interior Ministry and a former head of Germany's foreign intelligence service, said today the three men had backers at home and abroad who were still being tracked.
The three men arrested on Tuesday had reportedly accumulated vast amounts of bomb-making chemicals and detonators.
Officials have said all three of the men had trained in militant camps in Pakistan before forming a domestic cell of the "Islamic Jihad Union" - a little known al-Qaeda-affiliated Sunni Muslim group with roots in Uzbekistan.