SEOUL/WASHINGTON (Reuters) - North Korea's leader has delayed a decision on firing missiles towards Guam while he watches U.S. actions a little longer, the North's state media said on Tuesday, as South Korea's president said Seoul would seek to prevent war by all means.

In his first public appearance in about two weeks, Kim Jong Un inspected the command of the North's army on Monday, examining a plan to land four missiles near the U.S. Pacific territory of Guam, the official KCNA said in a report.

"He said that if the Yankees persist in their extremely dangerous reckless actions on the Korean peninsula and in its vicinity, testing the self-restraint of the DPRK, the latter will make an important decision as it already declared," the report said.

The DPRK stands for North Korea's official name, the Democratic People's Republic of Korea.

Pyongyang's plans to fire missiles near Guam prompted a surge in tensions in the region last week, with U.S. President Donald saying the U.S. military was "locked and loaded" if North Korea acted unwisely.

South Korean President Moon Jae-in said on Tuesday there would be no military action without Seoul's consent and his government would prevent war by all means.

"Military action on the Korean peninsula can only be decided by South Korea and no one else can decide to take military action without the consent of South Korea," Moon said in a speech to commemorate the anniversary of the nation's liberation from Japanese military rule in 1945.

"The government, putting everything on the line, will block war by all means," Moon said.