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North Korea has been accused of conducting a GPS jamming attack on South Korean ships and aircraft.

What’s the deal: According to South Korea’s Joint Chiefs of Staff (JCS), North Korea conducted GPS jamming attacks on November 8 and 9, disrupting the operations for multiple ships and dozens of civilian aircraft in South Korea’s Yellow Sea. The interference impacted navigation near Haeju and Kaesong, prompting the JCS to issue warnings to vessels and aircraft in the area to exercise caution.

Although the signal was weaker than in previous incidents, such as the widespread disruptions in May and June. In a statement, South Korea’s JCS said, “We strongly urge North Korea to immediately cease its GPS provocations and warn that it will be held responsible for any subsequent issues arising from this.”

This all comes as South Korea’s military responded to the latest jamming incidents by conducting a missile test of the “Hyunmoo” missile. The missile is a critical component of South Korea’s “Kill Chain” preemptive strike capability.