LISBON (Reuters) - Portuguese air traffic authorities have intercepted a message describing a militant threat against the Eiffel Tower and have passed it to French authorities, a Portuguese source said on Friday.
"It is true we intercepted a conversation with terrorist threats to the Eiffel Tower yesterday," the source, who asked not to be named, told Reuters. "Our air force informed the French air force of this matter.
Paris police referred inquiries to the Eiffel Tower where nobody was immediately available for comment.
French daily Le Monde reported on Friday that intelligence services were tracking the authors of the message.
The newspaper said Portuguese air traffic authorities had intercepted a "vague and confused" short wave radio message on Thursday, according to a police source.
The French capital is already at its second highest security alert level and further public security measures would serve little purpose, Le Monde quoted police as saying.
"We've been at red for several months. It's the highest level before scarlet alert which is implemented when there are attacks," the local police headquarters told the newspaper.
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