Iraq's most wanted man, the fugitive Abu Musab al-Zarqawi, has been planning a chemical weapons attack in Europe, a German magazine said on Wednesday, citing intelligence sources. "We in Europe have been afraid that a big bang is coming sometime and that Zarqawi is planning it," an official at Germany's BND federal intelligence service told. According to the magazine, the Jordanian extremist and his supporters, who are linked to the Al-Qaeda network, have been trying to get hold of arms components in Russia's volatile north Caucasus region and in Georgia. Another BND source said that it was unclear whether Zarqawi's attempts had been successful. "We only know that he is working on it," the source said. Zarqawi is also being tried in absentia by Jordan's courts for planning a major chemical weapons attack that was uncovered by the authorities.