South Korea and China expressed their regrets over news coming out of North Korea Tuesday concerning that country's nuclear aims.

North Korea announced that they will be re-starting operations at the Yongbyon Nuclear Complex, a uranium enrichment plant with a five megawatt graphite moderated reactor located 55 miles north of Pyongyang. In a statement from North Korea’s state news agency, it was said that the facilities would be re-started without delay.

Saying that North Korea should keep their promises as well as agreements and keep the Korean peninsula denuclearized. South Korean Foreign Minister Spokesman Cho Tai-young called the North Korean announcement “truly regretttable.”

China voiced concern on Tuesday as well. Calling for calm and restraint, Beijing’s Foreign Ministery Spokesman said, “We have noticed the remarks of the DPRK and express our regrets.”

Concerned over the rising tensions on the Korean Peninsula, the U.N. Secretary-General Ban Ki-moon related that he was deeply troubled and pointed out that there was no need for the North to be on a collision course with the International community. He further stated, “Nuclear threats are not a game, the current crisis has already gone too far.”

The Yongbyon Complex was built in 1986, but was shut down as a result of the International Nuclear Disarmament Talks that took place in 2007. Those aid for disarmament talks included North and South Korea, China, Russia, Japan and the United States. North Korea was given 50,000 tons of heavy fuel oil for the shut-down.

The cooling tower for the complex was destroyed in 2008. This cooling tower will need to be re-built, making it several months before the complex could be brought back online according to estimates.

The plutonium reprocessing section of the complex was brought back online in 2009 and produced enough weapons-grade material for six to eight bombs during that time it is estimated.

Then, in 2012 the enrichment plant was shut down in return for 240,000 tons of food aid.

It would take another four years to refine enough material to make two nuclear devices according to the Korean Institute for Defense Analysis.

North Korea never stated that they had stopped enriching uranium at the site however.

The United States announced this week that two missile armed warships, the USS McCain and the USS Decatur, have been deployed to the vicinity of the peninsula.

A Pentagon official also said Monday that the sea-based x-band radar will be moved from Hawaii closer to the Korean Peninsula. The x-band radar is a self-propelled ocean-going radar platform.