North Korea has against denounced the joint military exercises between the US, South Korea and Japan

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For the fifth day in a row, North Korea has stopped communicating regularly with its southern counterpart.

Friday, officials from South Korea's government said that its northern neighbor hasn't responded through the two-way military liaison line, which is normally used twice a day.

The North Korean government has continued to refuse to use the phone system ever since, most likely as a protest against the joint military drills that the United States, South Korea, and Japan were holding.

NORTH KOREA Removes ROUTINE CALLS WITH SOUTH KOREA AS Pressures RISE

In this image taken close to the ceasefire town of Panmunjom inside the neutral territory (DMZ) isolating the two Koreas, a North Korean banner vacillates in the breeze at the promulgation town of Gijungdong in North Korea.

A North Korean flag is seen fluttering in the wind at the propaganda village of Gijungdong in North Korea in this image that was taken close to the truce village of Panmunjom within the demilitarized zone (DMZ) that separates the two Koreas. "The government expresses strong regret over the North's unilateral and irresponsible attitude," Anthony Wallace/AFP via Getty Images. We unequivocally caution that this will just lead the North to disconnect itself and face more tough spots," Kwon Youthful se, South Korea's unification serve, said in a proclamation on Tuesday.

For logistical and diplomatic reasons, representatives of both North and South Korea are connected via a phone line that goes both ways.

The United States and its partners stage warfare drills as Japan, South Korea, and China strengthen their alliance against China and North Korea. A file image of North Korea's missile launch is shown on a television screen at the Seoul Railway Station in South Korea during a news program.

During a news program at the Seoul Railway Station in South Korea, a file image of North Korea's missile launches is displayed on a television screen. AP Photo/Ahn Young-joon) Officials in South Korea claimed that the communication technology itself did not have any flaws or problems, which would suggest that North Korea was deliberately unresponsive.

The silence is most likely a protest against the United States, South Korea, and Japan's increasingly frequent joint military drills in the region.

Last week, state media in North Korea issued a warning that the international security situation in the region is "on the brink of a nuclear war" as a result of recent military drills between the United States and South Korea.

NORTH KOREAN STATE MEDIA SAYS US-SOUTH KOREA MILITARY DRILLS PUSH REGION TO "BRINK OF A NUCLEAR WAR" Last week, North Korean state media issued a warning that the current international security situation in the region is on "the brink of a nuclear war."

Last week, state media in North Korea issued a warning that the international security situation in the region is "on the brink of a nuclear war" as a result of recent military drills between the United States and South Korea. Getty Images) A day earlier, during joint exercises with South Korea, the United States military flew nuclear-capable B-52 bombers over the Korean peninsula.

"The U.S. started off various biggest at any point joint military drills against the DPRK at the same time in spite of the last option's rehashed grave admonitions, driving the security circumstance of the Korean landmass to the edge of an atomic conflict," read an article distributed by the state-run Korean Focal News Organization on Thursday. 

A B-52H Stratofortress aircraft fr

om the United States Air Force flies in formation with F-15K fighters from South Korea over the western sea of the Korean peninsula during a joint air drill in South Korea.

A U.S. Aviation based armed forces B-52H Stratofortress airplane, top, flies in line with South Korea's Flying corps F-15K contenders over the western ocean of Korean promontory during a joint air drill in South Korea. ( The aircraft carrier USS Nimitz, along with Japanese, South Korean, and American destroyers, took part in this week's naval anti-submarine drills, according to the South Korean Defense Ministry and the Associated Press.