Islamist militants want to attack the Channel Tunnel between England and France during the holiday season, a British newspaper reported Sunday, citing French and US security sources. The Observer said the French foreign intelligence service, DGSE, warned the French government of the threat in a Dec. 19 report after a tip-off from the CIA. The newspaper cited French sources as saying the plot was being directed from Pakistan and involved Western European militants, possibly Britons of Pakistani descent. The newspaper said US sources described the threat to the tunnel, which is used by millions of rail passengers each year, as "sky high." French Defense Ministry officials had no immediate reaction to the report.