No special movement has been detected in North Korea in the wake of the North's seizure of a South Korean fishing vessel and its crew.

A Unification Ministry official in Seoul said Sunday that the government is awaiting the North's response on the return of the ship and crew. Pyongyang said it will wait after the results of an investigation come out.

The official said Seoul will decide whether to send a third request for the release of the ship and crew.

The 29-ton 800 Yeonan-ho was towed into the communist country after crossing the de facto inter-Korean sea border Northern Limit Line Thursday morning.