A planned upcoming joint military drill by the U.S. and South Korea could impact North Korea’s willingness to hold planned working-level negotiations over its nuclear program, Pyongyang’s foreign ministry warned on Tuesday.

In two statements carried by the country’s state-run Korean Central News Agency (KCNA), the North’s Ministry of Foreign Affairs (MFA) slammed the upcoming 19-2 Dong Maeng exercise as a violation of last year’s DPRK-U.S. agreement in Singapore.

The aftermath of that agreement saw U.S. President Donald Trump promise an end to joint U.S.-ROK “war games” on the peninsula and came following the North’s pledge to stop missile and