(VOVworld) - South Korea said Monday it will further limit access by its nationals to a joint industrial park in North Korea to ensure their safety following the North's claimed test of a hydrogen bomb last week.

Kaesong industrial complex in North Korea (Photo: AP)

The Unification Ministry said that it plans to only permit entry by a "minimum" number of South Koreans to the Kaesong Industrial Complex in the North's border city of the same name. The move will be effective starting Tuesday. The government said Monday that it will only allow South Korean businessmen directly involved in the operation of factories to enter the park. Contractors will only be allowed into the park if they enter and leave on the same day. The Unification Ministry’s spokesman  Jeong Joon-hee said the move is aimed at securing the safety of South Koreans as the North is expected to react to Seoul's resumption of anti-North Korean loudspeaker broadcasts. He stressed whether South Korea applies further measures will depend upon relevant circumstances.