Lee Jin-man, AP
FILE — In this Friday, March 18, 2016, file photo, visitors look at the northern side at the Imjingak Pavilion near the border with North Korea, in Paju, South Korea. North Korea fired a short-range projectile from an area near its eastern coast on Tuesday, March 29, 2016, South Korean officials said, in what appears to be another weapons test seen as a response to ongoing military drills between Washington and Seoul.(AP Photo/Lee Jin-man)

SEOUL, South Korea — South Korea's Yonhap news agency says North Korea has fired a projectile into the sea.

Yonhap, citing an unidentified military official, said the projectile believed to be a ballistic missile flew into waters off the North's east coast on Friday. It has no further details.

South Korea's Defense Ministry says it cannot confirm the Yonhap report.

The launch, if confirmed, is the latest in a series of weapons launches the North has carried out in an apparent response to ongoing military exercises between the United States and South Korea.

North Korea views the drills as an invasion rehearsal.