President Trump tweeted that "military solutions" are "fully in place, locked and loaded" Friday, as China appealed for North Korea and the United States to “exercise caution” in their escalating war of words.

It came after North Korea said it was writing a plan to fire missiles toward the western Pacific island of Guam, a U.S. territory.

Trump tweeted Friday: "Military solutions are now fully in place,locked and loaded,should North Korea act unwisely. Hopefully Kim Jong Un will find another path!"

On Thursday, Trump said his earlier warning to unleash "fire and fury" on Pyongyang if it doesn't abandon its nuclear program perhaps “wasn’t tough enough."

Chinese Foreign Ministry spokesman Geng Shuang said the situation on the Korean Peninsula “is complex and sensitive.” China is Pyongyang's most important ally.

“The Chinese side hopes all related parties will exercise caution in their words and actions and make greater efforts to alleviate the tense situation and enhance mutual trust, while not traveling the old path of making displays of strength and constantly exacerbating the situation,” Geng said in a statement Friday.

U.S. allies and China have already appealed to Trump and North Korean leader Kim Jong Un to soften their rhetoric.