SEOUL — North Korea declared a no-sail zone over the East Sea, raising concerns over another missile launch, a South Korean news agency reported on April 6.

North Korea put the no-sail zone over a specific are of the East Sea on April 1, Yonhap News Agency reported quoting an unnamed government official. The source said that there was no end date specified.

Another source told Yonhap that several TEL (Transporter Erector Launcher) vehicles carrying Rodong missiles were identified in the east coast area of North Korea.

“North Korea might test-fire missiles on Kim Il Sung’s birthday,” the source was