From the AP:
Authorities sealed off a nuclear plant in southeastern Sweden after a welder arrived for work with a plastic bag containing traces of an explosive substance, police and plant officials said.
Investigators were questioning the man, a welder who was scheduled to do work at the Oskarshamn plant on Wednesday, police spokesman Sven-Erik Karlsson said.
Plant operator OKG downplayed the incident, saying there was no threat to the safety of the plant, located about 150 miles (250 kilometers) south of Stockholm.
Police said the man was carrying a plastic bag with an unknown amount of triacetone triperoxide, or TATP, an explosive used in the London bombings in 2007.
However, plant spokesman Anders Osterberg said there were no explosives inside the bag, though traces of an explosive substance were found on the bag’s handle.
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