Paris: Police is investigating a possible attack

U.S. officials at the embassy in Paris showed symptoms of poisoning when they opened the mail.

The three men are out of danger, while officials investigate whether it was a terrorist attack.

The French police spokesman said it has already deployed a mobile laboratory to analyze toxic substances.

The building was not evacuated, but authorities are alert due to this rare case, which recalls the Anthrax terrorist attacks after the Twin Towers episode.