Defence talks end abruptly when NK military officers walk out

The transcript discusses a meeting where North Korea criticized South Korea for not changing its stance and withdrew from the talks. North Korea claimed it was not involved in the Cheonan incident and accused the South of using it as a pretext for confrontation. The South criticized North Korea's provocations, including civilian casualties. Despite the tensions, South Korea expressed willingness to resume high-level military talks if North Korea accepted the proposed agenda.

At what time did the North unilaterally withdraw from the meeting?

What accusations did the North make regarding the South's policies?