But he said rio was concerned about the detentions .

但他表示，力拓对拘留行动感到担忧。

The south korean coast guard said its arrests and detentions are up about 25 % over the same period , to about 500 .

韩国海岸警卫队说，逮捕和扣押的人数比前一年同期上升了25%，达到了约500人。

But they may explain the detentions .

但这些指控也许可以解释拘留行动。

People in the industry say more detentions followed .

业内人士说之前有更多的拘留事件。

According to human rights groups , repression and illegal detentions increased during the olympic period .

人权组织称，奥运期间的压制活动和非法拘留均有所上升。