South Korea's government said Sunday it believes North Korea may test a missile around April 10, citing as an indicator Pyongyang's push for workers to leave the Kaesong Industrial Complex by then.

Seoul "is on military readiness posture," said South Korea's Blue House spokeswoman Kim Haeng in a briefing. She said national security chief Kim Jang-soo also based the assessment on North Korea's hint to foreign diplomats in Pyongyang to send personnel out of the country.