Peru's army has set up checkpoints and imposed curfews in the jungle state of Amazonas after clashes between police and indigenous protesters.
At least 22 police and nine protesters have died, officials say. Protesters say 30 indigenous Indians are dead.
The trouble began on Friday near Bagua with protesters angry at plans to drill for oil and gas on ancestral land.
They took 38 police officers hostage - at least nine were killed on Saturday as the army moved in to free them.
This is the worst violence in Peru since the end of the Shining Path insurgency in the 1990s and the biggest internal challenge faced by President Alan Garcia since he came to power in 2006, the BBC's Americas editor Emilio San Pedro says.
The curfew - from 1500 to 0600 (2000-1100 GMT) - took effect immediately, as the authorities announced they had made 72 arrests.
In a statement, President Garcia said Peru ...