Sweden's Foreign Minister Carl Bildt noted Saturday that "Beijing likely to try to calm things down," he said on his Twitter account.
"But the Pyongyang regime is the most militarised, the most authoritarian and the most closed in the world," Bildt tweeted.
Tensions escalated on the Korean Peninsula after the North carried out a long-range rocket launch in December and an underground nuclear test last month, prompting the U.N. Security Council to step up sanctions on the secretive government.
Pyongyang has expressed fury about the sanctions and the annual U.S.-South Korean military exercises, due to continue until the end of April.
The deteriorating relations have killed hopes of reviving multilateral talks over North Korea's nuclear program for the foreseeable future. Indeed, Pyongyang has declared that the subject is no longer up for discussion.