Jakarta, Nov. 1 -- Indonesia's Forestry Ministry is tightening security at fire-affected forest sites in Central Kalimantan, installing warning signs and prohibiting unauthorized activities.

Forestry Minister Raja Juli Antoni said on Sunday the measures aim to strengthen protection and prevent illegal activities in areas vulnerable to unauthorized use.

"The signs are part of the ministry's efforts to secure areas that have been sanctioned and require monitoring and restoration," Raja Juli said.

The signs have been installed at several sites within forest areas held under Forest Utilization Business Permits (PBPH) previously sanctioned by the ministry.

The sanctions include permit suspensions and orders requiring companies to restore d...