Earlier on Friday, German newspaper Bild reported that the man was suspected of selling four weapons to the militants who killed 130 people in Paris on Nov. 13.
The paper said four assault rifles -- two AK-47s made in China and two Zasatva M70s made in the former Yugoslavia -- were sold online by the man on Nov. 7 to a buyer of "Arab descent".
Four emails since found on the man`s smartphone indicate that he was in touch with an "Arab in Paris", Bild said. The paper added that French prosecutors believe the weapons were used in the Paris attacks.
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