SEOUL: South Korea's military on Monday warned North Korea not to go ahead with its planned spy satellite launch, suggesting that Seoul could suspend an inter-Korean agreement to reduce tensions and resume front-line aerial surveillance in response.

North Korea failed in its first two attempts to put a military spy satellite into orbit earlier this year and didn't follow through with a vow to make a third attempt in October. South Korean officials said the delay was likely because the North was receiving Russian technology assistance and that a launch could happen in the coming days.