North Korea's government fired another salvo of words Saturday, taking aim at President Donald Trump's remarks and warning that the "American empire will meet its tragic doom" if the Trump administration does not "talk and act properly."

The statement was issued through North Korea's state-run media, reports ABC News, and complained about strategic nuclear assets being introduced into the Korean peninsula area.

"Of late, the president and other riffraff of the U.S. are trumpeting about 'military option' against the DPRK, claiming that they 'will not rule out a war,'" the North Korean statement read. "Meanwhile, they introduce huge strategic nuclear assets into the Korean peninsula, staging reckless nuclear war games and rendering the regional situation extremely tense."

The statement was released on the heels of a telephone call between China's President Xi Jinping and Trump, in which the Chinese leader urged a peaceful resolution to the tensions, and for both sides to avoid strong statements or actions.

Xi's call came hours after Trump warned North Korea that the U.S. military is "locked and loaded," and as the Pentagon said the United States and South Korea plan to proceed with a joint military exercise in 10 days.

On Saturday, North Korea further accused the United States of "doing all sorts of wrongs" to its country, while "styling itself the 'only superpower' in the eyes of the world."

"Now it finds itself in an ever worsening dilemma, being thrown into the grip of extreme security unrest by the DPRK [Democratic People's Republic of Korea, North Korea's official name]. This is tragicomedy of its own making."

Further, North Korea declared its military is "capable of fighting any war the U.S. wants is now on the standby to launch fire into its mainland, waiting for an order of final attack."

On Friday, Trump himself had yet another warning for North Korea, which has threatened to launch attacks on Guam, where several U.S. military assets are located.

"If he utters one threat in the form of an overt threat — which, by the way, he has been uttering for years, and his family has been uttering for years — or if he does anything with respect to Guam or any place else that's an American territory or an American ally, he will truly regret it, and he will regret it fast," the president said.

Later in the day, he reassured residents of Guam to "believe me, they will be very safe. And if anything happens to Guam, there's going to be big, big trouble in North Korea."