All the information available so far seems to come from release of ABI (the Bolivian government's press agency). It indicates that 16 Muslim people from Bangladesh -that's not the same country as Pakistan, Crónica!- have been arrested following a tip by French authorities that they could be implicated in a (presumptive) plan to hijack a plane in the La Paz-Santa Cruz-Buenos Aires route and direct it against US targets (most likely, I presume, in Buenos Aires). You can read about these reports in Reuters Alertnet (other articles, like Wired's, are just rehashings of Reuter's somewhat skeptical notice of the ABI press release).

As in most cases where (presumed) links to terrorism are present, there are more assumptions, maybes and coulds than hard data. We'll have to see how this develops.

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As an aside unrelated to the story itself, let it be noted that, as far as I can tell, Southern Exposure put the story online well before Reuters did. That's (part of) what this "New Media" thing is about, not online newspapers with pop-up advertising...