Beijing expressed "serious concerns" on Wednesday over Pyongyang's recent comments regarding further nuclear and missile tests, saying it is resolutely opposed to any words or actions that could increase tensions.

"The current situation on the Korean Peninsula is complicated and sensitive. ... All related parties should make practical efforts to ease the tensions," Foreign Ministry spokesman Lu Kang said at a daily news conference in Beijing.

The Democratic People's Republic of Korea recently threatened to conduct more missile tests on a weekly, monthly and yearly basis, and it said the next nuclear test could take place "at a time and at a place where our headquarters deems necessary".