German prosecutors said on Wednesday they had charged a Turkish-German citizen with suspected links to one of four men currently on trial for allegedly plotting to attack US targets in Germany.
The 24-year-old, named only as Kadir T, was charged on November 20 with support of an "international terrorist organisation" and violating export laws, federal prosecutors said in a statement.
According to the charge sheet, T regularly attended weekly meetings organised by Adem Yilmaz with the aim of recruiting new members for the Islamic Jihad Union (IJU), an extremist group with suspected links to Al-Qaeda.
Yilmaz and two others were arrested in September 2007 mixing chemicals to make the equivalent of 410 kilogrammes of explosives -- 100 times the amount used in the 2005 London bombings that killed more than 50 people.
A fourth man, Atilla Selek, was arrested soon after in Turkey.
The four, known as the Sauerland cell after the German region where they were captured, are currently on trial in Duesseldorf and could face 15 years in prison.
Kadir T, who has dual German and Turkish nationality, has been in custody since August 26.