A nuclear plant in Sweden was sealed off Wednesday after a worker was stopped at its entrance with a highly explosive substance, police said.Sven-Erik Karlsson, spokesman for Kalmar County Police, said investigators were questioning the man, a welder who was scheduled to work at the plant.
Karlsson said the man carried a plastic bag with an explosive substance as he tried to enter the Oskarshamn nuclear plant on the country's southeast coast.
He said police received a call from the facility at 7:58 a.m. local time.
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