The U.N. aviation authority will issue a warning to North Korea over its jamming of GPS signals near the inter-Korean border this year, after Seoul accused the DPRK of endangering more than 4,400 civilian aircraft.

The International Civil Aviation Organization (ICAO) adopted the decision during its 234th council session held in Montreal from March 10 to April 4, Seoul’s foreign ministry announced in a press release Monday. 

The ICAO council will notify North Korea of its latest decision via a letter from its president, marking the second consecutive year that the U.N. authority has explicitly identified Pyongyang as the source