A Swedish newspaper published a report on this case (thanks to Sridhar for the alert). Rahul has posted a translation of this report on his blog. We learn that at least two of the authors have distanced themselves from the plagiarized paper. There's also a curious twist: "One of [the other two] claims in an email to the Swedish researchers that he received a draft from a researcher in Nepal."
As they say, read the whole thing, and Rahul's comments at the end.
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Before closing, I just want to quote the last paragraph from the newspaper report:
According to the Swedish regulation on university colleges, it is the duty of the university college since September 1st, 2006 to investigate all reported cases of suspected scientific cheating.
The ball is in Anna University's court; let's see how it plays this one.