The Cambodian Center of Human Right's (CCHR) attempt to launch a "black box"

anti-corruption campaign to the public on September 4 was immediately blocked by

police in Toul Kok, and a CCHR worker taken to jail.

As a CCHR truck, carrying a large black box and loudspeakers, left the CCHR office,

police prevented it from taking its planned route through Phnom Penh's streets first

by installing iron roadblocks and then by confiscating the truck.

Permission for the CCHR demonstration had been refused by the Phnom Penh Municipality

because the demonstration had been deemed a disruption to public order.

The truck and driver remain in police custody.