WASHINGTON -- The Pentagon says the U.S. hasn't moved any additional U.S. assets to the area around the Korean peninsula as a result of today's confrontation between North and South Korea.
A spokesman says it's "premature" to say whether the U.S. is considering any response.
At least two South Korean marines were killed when North Korea shelled an island where military exercises were taking place.
The White House is condeming the attack -- the latest in a series of provocations that have revived concerns about the threat posed by North Korea. President Barack Obama was awakened early today and briefed on the developments.
Although the White House had strong words for North Korea -- demanding that it stop its "belligerent action" -- the administration is tempering Obama's direct involvement by planning a written statement from him, instead of public remarks.