The North Korean government has issued a warning to China, saying that it would suffer "catastrophic consequences" for siding with the U.S., the Daily Star reported.
In a statement made through the Korean Central News Agency (KCNA), North Korea accused China of allegedly failing to criticize the actions of the Trump administration and at the same time taking punitive measures against North Korea.
North Korea has been reportedly hit hard by the strict economic sanctions imposed by Beijing.
"It should get itself ready to face the catastrophic consequences to its relations with the DPRK," the statement said.
Historically, China and North Korea have cooperated and worked together, with China being the other's biggest trading partner.
But the statement said: "Not a single word about the U.S. act of pushing the situation on the Korean Peninsula to the brink of war after introducing its hugest-ever strategic assets to our waters is made.
"But such rhetoric as 'necessary step' and 'reaction at decisive level' is openly heard from a country around the DPRK (North Korea) to intimidate it over its measures for self-defense."
Reports said earlier this month that China plans to send military vehicles to North Korea's border as a move to ease tensions between the U.S. and North Korea that could trigger a nuclear war.
But in its statement, North Korea criticized the China-U.S. alliance, particularly the economic sanctions.
"Particularly, the country is talking rubbish that the DPRK has to reconsider the importance of relations with it," the statement added.
"If China keeps applying economic sanctions to the DPRK while dancing to the tune of the U.S. after misjudging the will of the DPRK, it may be applauded by the enemies of the DPRK.
"But it should get itself ready to face the catastrophic consequences to its relations with the DPRK."
The tensions between the U.S. and North Korea heightened as U.S. President Donald Trump deployed a U.S. fleet to the Korean Peninsula, raising fears of World War III.
This week, U.S. Vice President Mike Pence announced that it would push through with plans to deploy the THAAD missile system to South Korea and hope to deliver it as soon as possible.