Hong Kong (CNN) -- The United States' plans to beef up its missile defenses against North Korea are likely to inflame tensions that are running high over Pyongyang's nuclear program, China said Monday.
"Bolstering missile defenses will only intensify antagonism, and it doesn't help to solve the issue," Hong Lei, a spokesman for the Chinese Ministry of Foreign Affairs, said at a regular news briefing in Beijing.
The United States will deploy additional ground-based missile interceptors on the West Coast as part of efforts to enhance the nation's ability to defend itself from attack by North Korea, Defense Secretary Chuck Hagel announced Friday.
The U.S. announcement came after North Korea recently threatened a pre-emptive nuclear attack on South Korea and the United States in response to stepped-up U.N. Security Council sanctions over its latest nuclear test last month.
Under threat, South Koreans mull nuclear weapons
North Korean leader Kim Jong Un inspects a military factory in this undated picture released by the Korean Central News Agency on Friday, May 17. North Korea launched several short-range guided missiles into the sea off the Korean Peninsula's east coast May 18, South Korea's semi-official news agency Yonhap cited the South Korean Defense Ministry as saying.
Photos: Kim Jong Un's military
U.S. to boost missile defense
North Korea raising decibel on threats
The threat from the regime of young leader Kim Jong Un was part of a recent barrage of vitriolic statements, which included a vow to nullify the armistice agreement that stopped the Korean War in 1953.
Military and White House officials have said current U.S. missile defenses are adequate for the present level of threat, and President Barack Obama said in an interview with ABC News last week that he didn't think North Korea could carry out a missile attack on the United States.
"They probably can't, but we don't like the margin of error," Obama said.
The 14 additional interceptors, to be installed by 2017, would bring the total to 44, according to the Pentagon.
"The reason that we are doing what we are doing and the reason we are advancing our program here for homeland security is to not take any chances, is to stay ahead of the threat and to assure any contingency," Hagel said.
Concerns about regional stability
But Hong said Monday that China believes that the anti-missile issue "matters to global strategic balance and regional stability. It also matters to strategic trust between relevant countries."
North Korea on Saturday responded to the U.S. announcement by criticizing what it described as the Americans' "hostile policy" and saying it won't negotiate with them over its nuclear program.
Its nuclear weapons "serve as an all-powerful treasured sword for protecting the sovereignty and security of the country," a Foreign Ministry spokesman said, according to the North's state-run Korean Central News Agency. "Therefore, they cannot be disputed ... as long as the U.S. nuclear threat and hostile policy persist."
Tensions on the Korean Peninsula escalated in December, when North Korea successfully launched a long-range rocket, putting a satellite in space for the first time.
The United States and other Western nations called the launch a test of ballistic missile technology, and the U.N. Security Council tightened sanctions on the regime in Pyongyang.
North Korea responded angrily to the U.N. measures, vowing to carry out its third nuclear test. It made good on its promise last month, prompting the U.N. Security Council to expand sanctions further, which in turn set off the latest flurry of fiery North Korean rhetoric.
U.S. lawmaker questions North Korean leader's 'stability'
CNN's Dayu Zhang in Beijing contributed to this report.
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Kim Jong Un visits the Ministry of People's Security on Wednesday, May 1, as part of the country's May Day celebrations.
A North Korea soldier gestures to stop photographers from taking photos from a Chinese tour boat as other soldiers look on along the North Korean bank of the Yalu River near the town of Sinuiji across the Chinese city of Dandong in Liaoning province, China, on Saturday, April 6.
North Korean soldiers gather by the docks in Sinuiju near the Chinese border on Thursday, April 4.
North Korean soldiers patrol along the Yalu River in Sinuiju across the border from the Chinese city of Dandong on April 4.
Kim Jong Un is briefed by his generals in this undated photo. On the wall is a map titled "Plan for the strategic forces to target mainland U.S."
Kim Jong Un works during a briefing in this undated photo.
North Korean leader Kim Jong Un inspects drills by the Korean People's Army navy at an undisclosed location on North Korea's east coast on March 25 in a photo from the state-run Korean Central News Agency.
Kim makes his way to an observation post with North Korean soldiers on March 25.
Kim uses a pair of binoculars to look south from the Jangjae Islet Defense Detachment near South Korea's Taeyonphyong Island on March 7.
Kim is greeted by the family of a soldier as he inspects Jangjae Islet Defense Detachment near South Korea's Taeyonphyong Island in South Hwanghae province on Thursday, March 7, in a photo from the state-run Korean Central News Agency.
Kim is surrounded by soldiers during a visit to the Mu Islet Hero Defense Detachment near South Korea's Taeyonphyong Island on March 7. North Korea has escalated its bellicose rhetoric, threatening nuclear strikes, just before the U.N. Security Council passed tougher sanctions against the secretive nation on March 7.
Kim arrives at Jangjae Islet by boat to meet with soldiers of the Jangjae Islet Defense Detachment near Taeyonphyong Island in South Hwanghae province on March 7.
Soldiers in the North Korean army train at an undisclosed location on March 6.
North Korean leader Kim Jong Un, center, poses with chiefs of branch social security stations in this undated picture released by North Korea's official news agency on November 27.
Kim celebrates with staff from the satellite control center in Pyongyang, North Korea, during the launch of a rocket carrying a satellite, in a photo released by the official North Korean news agency on December 12.
A crowd watches as statues of the nation's founder, Kim Il Sung, and his son Kim Jong Il are unveiled during a ceremony in Pyongyang on April 13, 2012. Photos from North Korea are rare, but the country was on full display in April 2012 as it celebrated the 100th birthday of Kim Il Sung.
A North Korean soldier stands guard in front of an UNHA III rocket at the Tangachai-ri Space Center on April 8, 2012.
In April 2012, Pyongyang launched a long-range rocket, which broke apart and fell into the sea. The UNHA III rocket is pictured on its launch pad in Tang Chung Ri, North Korea.
A closer look at the UNHA III rocket on its launch pad in Tang Chung Ri, North Korea.
A military vehicle participates in a parade in Pyongyang on April 15, 2012.
North Koreans wave flags in front of portraits of Kim Il Sung, left, and his son Kim Jong Il during celebrations to mark the 100th birth anniversary of Kim Il Sung in Pyongyang on April 16, 2012.
North Korean soldiers relax at the end of an official ceremony attended by leader Kim Jong Un at a stadium in Pyongyang on April 14, 2012.
Kim Jong Un applauds as he watches a military parade in Pyongyang on April 15, 2012.
A North Korean soldier stands on a balcony in Pyongyang on April 16, 2012.
North Korean soldiers march during a military parade in Pyongyang on April 15, 2012.
Soldiers board a bus outside a theater in Pyongyang on April 16, 2012.
North Korean performers sit below a screen showing images of leader Kim Jong Un in Pyongyang on April 16, 2012.
North Korean soldiers salute during a military parade in Pyongyang on April 15, 2012.
Kim Jong Un visits the Rungna People's Pleasure Ground, which is under construction in Pyongyang, in a photo released on July 3, 2012, by North Korea's official Korean Central News Agency.
North Korean soldiers listen to a speech during an official ceremony attended by leader Kim Jong Un at a stadium in Pyongyang on April 14, 2012.
Members of a North Korean military band gather following an official ceremony at the Kim Il Sung stadium in Pyongyang on April 14, 2012.
North Korean military personnel watch a performance in Pyongyang on April 16, 2012.
A North Korean controller is seen along the railway line between Pyongyang and North Pyongan province on April 8, 2012.
A North Korean military honor guard stands at attention at Pyongyang's airport during a diplomatic visit on May 2, 2001.
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