The Nimitz carrier strike group, which includes a guided missile cruiser and four destroyers, was kept in the Indian Ocean for a "prudent responsible decision," an official told the television channel.
Five US destroyers are now positioned in eastern Mediterranean waters, up from the usual three that normally focus on countering Iranian ballistic missile threats to Europe. The destroyers -- the USS Stout, Mahan, Ramage, Barry and Graveley -- are ready to fire cruise missiles if President Barack Obama gives the order.
In a surprise move, Obama has delayed the threat of missile strikes against Damascus that had appeared imminent, saying he would first seek formal approval from Congress.
