The Democratic People's Republic of Korea (DPRK) on Friday again accused the United States of conducting spy flights over its coastal area.

An unnamed spokesman for the air command of the Korean People's Army(KPA) said in a statement that the United States conducted a spy flight on Friday in its airspace over the east of Hwadae, Chongjin and other places along the eastern coast of the DPRK.

A U.S. reconnaissance plane flew over strategic DPRK targets for hours, said the statement carried by the official Korean Central News Agency(KCNA).

"The ceaseless illegal intrusions... have created an imminent danger of a military clash in the sky above those waters," said the spokesman.

This was the third warning in less than a week. The air command of the KPA issued two similar statements on Sunday and Monday.

The DPRK said the United States conducted more than 170 spy flights in May.

Source: Xinhua