North Korea was struck by a 5.6 magnitude tremor.

China's earthquake administration said it detected a 6.3 magnitude earthquake in Northeastern North Korea, calling it a "suspected explosion," Reuters reported.

The depth of the quake was recorded as zero meters, the China earthquake administration said, according to Reuters.

Previous tremors in the reclusive country have been caused by nuclear tests.

South Korea's Blue House, the country's equivalent of the White House, said that the North may conducted another nuclear test, the South's official news agency Yonhap reported.