But officials said they could not find any link between bin Laden and the six, who were arrested at a bus terminal early Sunday.
Turkish security forces have been alerted after reports that bin Laden supporters have entered the country during the past three months, prior to a November summit of Organization for Security and Cooperation Europe. President Clinton attended the summit.
The six, who claimed they were Libyan dissidents, were to be charged with traveling with fake passports and possessing material to make false passports, officials said.
Radical Islamic, leftist and Kurdish illegal groups are active in Istanbul.
The U.S. accuses bin Laden of masterminding the twin bombings of its embassies in east Africa last year.
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