**US Warns China on Cyber Security**
A senior White House official is calling on China to take "serious steps" to stop cybercrimes, saying the issue is a "growing challenge" to U.S.-China relations.
National Security Advisor Tom Donilon on Monday called on China to acknowledge the scope of the problem and engage in talks with the U.S. on acceptable behavior in cyberspace.
Chinese foreign ministry spokesperson Hua Chunying said Tuesday that Beijing was open to talks, but insisted that China is a victim, not perpetrator of computer crimes.
Several large U.S. technology companies, including Apple, Facebook, and Twitter, were hacked earlier this year. The New York Times, Wall Street Journal, and Washington Post newspapers also say they were attacked by China-based hackers.
In a speech Monday to the Asia Society in New York, Donilon said Chinese hacking attempts represent not only a national security concern, but also an economic one. He said U.S. businesses are increasingly concerned about "sophisticated, targeted theft of confidential business information."
The U.S. last month unveiled a new strategy to counter hackers and cyber spies, including the use of fines and trade actions against those targeting trade secrets.
Some U.S. lawmakers estimate that American companies lost more than $300 billion last year to trade secret theft, much of it to due to hacking by Chinese cyber spies.
**N.Korea Threatens to Turn S.Korean Island into 'Sea of Flames'**
North Korean leader Kim Jong Un has threatened to attack a South Korean border island in response to Seoul and Washington's ongoing annual military exercises.
Mr. Kim was quoted in state media Tuesday as telling front-line troops to prepare to destroy "enemy targets" on Baengnyeong island, near the site of a deadly North Korean attack in 2010.
It is the latest in a series of dramatic threats by North Korea following last week's U.N. sanctions over its latest nuclear test.
Seoul's Defense Ministry spokesperson Kim Min-seok on Tuesday said there is no evidence of an impending attack or weapons test by North Korea, which he said is just trying to put "psychological pressure" on the South.