"The Ringhals nuclear power station is on the southwest coast of Sweden." Posted at Wall Street Journal website (wsj.com).

STOCKHOLM--Sweden raised the security alert level at its three nuclear power plants Thursday after explosives were found on a truck at the Ringhals nuclear power plant Wednesday.

A quantity of suspicious material was found by personnel carrying out normal security checks, and police sent a sample of the material by helicopter to a crime laboratory which confirmed that it was explosive. However, the material had no ignition device.
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