North Korea says it is prepared to defend itself against "reckless acts of aggression" from the United States.

The country’s foreign ministry said after the deployment of a U.S. Navy strike to the Korean Peninsula that “reckless moves for invading” are now in a “serious phase,” USA Today reported.

"We will hold the U.S wholly accountable for the catastrophic consequences to be entailed by its outrageous actions,” said the foreign ministry.

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The U.S. Navy on Saturday said it was moving the strike group toward the Korean Peninsula in response to concerns over North Korean aggression.

“The [Democratic People's Republic of Korea] is ready to react to any mode of war desired by the US," the ministry said on Monday.