JAKARTA, Sept 15 (Reuters) - An Indonesian mining

ministry official said that only operations at Grasberg Block

Cave have been halted due to a mud flow incident in the area

operated by Freeport Indonesia, with other smaller sites still

operational.

Overall, mining in the Grasberg area is currently at 30% of

normal capacity, Tri Winarno, a director general at the Energy

and Mineral Resources Ministry, said on Monday.