North Korea on Monday warned US troops stationed in South Korea to stop "provocations" in the buffer zone dividing the two Koreas or face a "resolute counteraction."
The warning came as the communist state has been ratcheting up tensions, preparing to launch what it claims is a satellite, declaring an all-out confrontation with the South and arguing over the inter-Korean sea border.
"If the US forces keep behaving arrogantly in the area under the control of the North and the South, the KPA (Korean People's Army) will take a resolute counteraction," the North's military said in a statement.
It did not elaborate on what the counteraction would involve.
The statement, carried by Pyongyang's official Korean Central News Agency (KCNA), was sent to the South's military on today, KCNA said.
According to the statement, US soldiers were stalking in groups in the demilitarized zone, a four kilometer (2.5 miles) wide buffer zone dividing the Korean peninsula, at will.
It said 62 US military personnel and 58 vehicles entered the zone and got as close as 100 meters from the military demarcation line (MDL), the zone's central division, on as many as 66 occasions up to February 20 this year.