South Korean and U.S. military officials have concluded two days of talks in Washington on the U.S. plan to cut back its troop presence in South Korea.

The South Korean delegation, led by Assistant Defense Minister for Policy Ahn Kwang-chan, reportedly urged Washington to delay its timetable for the troop cutback and readjust the American units that are to be included in the withdrawal.

Seoul is concerned over a possible security vacuum on the Korean Peninsula that might arise if Washington pulls out 12,500 of its troops from South Korea by the end of next year.

In particular, the Korean delegation also called on Washington to keep in place the multiple rocket launchers and Apache helicopter units in South Korea during the meeting - the 12th round of the Future of the Alliance discussions.

The U.S. reportedly responded that it might consider partial adjustments to its troop reduction plan.

South Korea and the United States are slated to finalize an agreement on the matter at next month's annual Security Consultative Meeting based on the outcome of this week's talks.