The AP notes that Chinese President Xi Jinping has been attempting to persuade Park to abandon the plan - China sees it as a US spying effort.
The missiles fired Monday do not travel as far as the one tested in June, known as a Musudan.
"Today's reckless launches by North Korea pose threats to civil aviation and maritime commerce in the region", the White House said in a statement.
North Korea test-fired three ballistic missiles from Hwangju in the North Hwanghae Province at around 12:14 p.m. local time, Yonhap News Service and the AP reported, citing South Korea's Joint Chiefs of Staff. Officials did not elaborate on the range of the missiles. Beijing has been angered by plans to deploy an advanced US missile-defense system, known as THAAD, in South Korea.
"The missile launch appears to be an armed protest meant to sustain military tension in the peninsula by boasting..."
"Just looking at the JL-1 and the North Korean SLBM, they're looking exactly the same", he said before claiming that China has a long track record of providing illegal weapons to North Korea including "transporter-erector-launchers (TEL)" which is a system used for launching missiles.
Such tests are fairly common when worldwide attention is turned to Northeast Asia, and this one comes as world leaders are gathering for the G-20 summit of advanced and emerging economies in the city of Hangzhou in eastern China.
05 de septiembre de 2016, 09:06Beijing, Sep 5 (Prensa Latina) China reiterated its opposition to the deployment of the US Terminal High Altitude Area Defense anti-ballistic system (THAAD) in South Korea.
North Korea previously launched a ballistic missile about two weeks ago. It comes only 10 days after the Security Council adopted a press statement condemning the North's launch of a ballistic missile from a submarine. The Chinese object particularly to THAAD's radar that would be positioned to scan a portion of Chinese territory as well as all of North Korea. The deployment of THAAD is a way the South has chosen to protect itself from the North, which constantly conducts nuclear tests and launches missiles, said Jin.
The stated goal of the THAAD system is to defend South Korea from missile attack from the North, but Beijing views it as an attempt to shift the regional power balance in favor of United States allies.
"We call on North Korea to refrain from actions that further raise tensions in the region and focus instead on taking concrete steps toward fulfilling its commitments and global obligations", he added.