Chinese flag is seen in front of the Friendship bridge over the Yalu River connecting the North Korean town of Sinuiju and Dandong in China's Liaoning Province on April 1, 2017. REUTERS/file

BEIJING: China called on Monday for all countries to make constructive efforts to ease tension after North Korea said the latest UN sanctions against it are an act of war and tantamount to a complete economic blockade.

The UN Security Council unanimously imposed new sanctions on North Korea on Friday for its recent intercontinental ballistic missile test, seeking to limit its access to refined petroleum products and crude oil and its earnings from workers abroad.

The US-drafted resolution also caps crude oil supplies to North Korea at 4 million barrels a year and commits the Council to further reductions if it were to conduct another nuclear test or launch another intercontinental ballistic missile (ICBM).

North Korea on Sunday rejected the resolution, calling it an act of war.