A grisly mystery is developing in northern France.rnAt least three seals have been found killed on a shore near the Netherlands since January. Two seals had bullet wounds, and a third was possibly suffocated or strangled, according to the French newspaper Nord Littoral.rnAnimal conservation group Sea Shepherd is offering a roughly $12,000 reward to anyone with information about the deaths. The group worries more seals have been killed.
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