A curfew is in force in in Bolivia for a census - the first in 11 years.
The BBC reports borders are closed, road traffic is banned and all citizens are ordered to wait at home to be counted on Wednesday.
Only emergency vehicles and people with a special permit are allowed in the streets.
People who are not at home for the census face heavy fines.
Government minister Carlos Romero said 35,000 policemen were deployed to enforce the regulations.
Alcohol consumption is also banned on census day.