The men were charged under the new penal code and will face an investigation.
Saloth Ban has been on the stand all week at the UN-backed court describing inner workings of the regime.
Sam Rainsy has been in exile since October 2009.
The program supports writers with editorial input and helps them break from self-censorship and traditional styles.
Police said the assault occurred when one of the purported victims and a security guard attempted to retrieve a necklace from the room.
His testimony corroborates that of convicted torture chief Duch, as prosecutors seek to tie Ieng Sary and two more leaders.
The World Bank is holding an annual meeting and the ABD is currently reviewing its policies on projects.
Keat Chhon is among six senior government officials who have refused to appear before the tribunal.
Hang Vuthy has already been given some 51 years of jail time for involvement in at least four serious crimes.
The World Bank subsequently froze its funding to Cambodia, pending more results in curbing land grabs.
The courier, Sot Troeung, linked Nuon Chea to the torture center Tuol Sleng in testimony Thursday.
Thailand and China want to boost annual bilateral trade to $100 billion by 2015.
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