This picture captured from the website of Russia's foreign ministry shows Russian Foreign Minister Sergey Lavrov, left, and his North Korean counterpart, Choe Son-hui, in Moscow, Sept. 17. Yonhap

North Korea's foreign minister has warned that Pyongyang will not overlook any hostile acts on the Korean Peninsula, claiming that the peninsula's security situation is heading for a "more dangerous threshold," the North's state media reported Sunday.

"Recently, the security situation has been an even more dangerous threshold," the North's Foreign Minister Choe Son-hui said in her address to the fourth Eurasian Women's Forum held in St. Petersburg, according to the Rodong Sinmun, Pyongyang's main newspaper.

Choe argued that an "alliance-seeking policy" of the United States and some countries that follow the U.S. has caused a "vicious cycle of escalating tensions and confrontation."

On Sept. 13, North Korea publicly disclosed its uranium enrichment facility for the first time, displaying images of leader Kim Jong-un calling for boosting the state's nuclear weapons.

The U.S. has strengthened security cooperation with South Korea and Japan, its major Asian allies, to counter North Korea's missile and nuclear threats.

On Saturday, the leaders of the U.S, India, Japan and Australia denounced North Korea's missile launches and its nuclear program and reaffirmed their commitment to the complete denuclearization of the Korean Peninsula. (Yonhap)