The South Korean military announced Tuesday that North Korea has attempted to disrupt GPS signals in the western inter-Korean border region for the fifth straight day.

During a regular press briefing, Joint Chiefs of Staff(JCS) spokesperson Lee Sung-jun said the latest GPS-jamming attempts occurred intermittently at a weak intensity in the early morning on islands in the Yellow Sea.

North Korea has been attempting to jam the South’s GPS signals every day since Friday, according to the JCS. 

Previous attempts took place in May and early June near the Northern Limit Line in the Yellow Sea.

They were considered provocative at the time, given the direction of the signals and the output intensity.

The JCS spokesperson said the recent attempts are largely part of North Korea’s training to prepare for encounters with drones.