(USA TODAY) -- CBS News tweeted early Tuesday morning that a U.S. official confirmed that American ships or planes are not behind the missile launches.
Separately, Pentagon spokesman Navy Commander William Speaks told the Associated Press: "I have nothing to confirm those reports whatsoever."
Russia's Defense Ministry declined comment.
Moscow said the launch was detected at 10:16 a.m. local time (2:16 a.m. ET).
The development comes as Congress prepares to hold a vote on whether the U.S. should take military action in Syria for the alleged use of chemical weapons by the regime of Syrian President Bashar al-Assad. Read more via USA Today...