The rotation of all 26 seats is determined by the amount of money candidates paid during the election campaign in 2008.
The residents of the neighborhood, known as Dey Krahorm, called for Prime Minister Hun Sen to step down from power.
Hun Sen was referring to the ongoing social upheaval in the North African country that toppled a longtime authoritarian president.
The four police officials were arrested for corruption in connection with drug trafficking.
Hun Sen was responding to concerns raised by the US lawmakers as the refugee center nears its closing date, Feb. 15.
The decision overruled a ruling by the Phnom Penh Municipal Court last week to hold five of seven Thais arrested in December.
The four men were charged under Article 38 of the 1992 penal code and face up to seven years in prison if convicted.
Protesters had prepared a letter for the embassy, but embassy officials would not accept it.
The recent midterm elections in US Congress should serve as a good model for Cambodians on how power can be shifted smoothly.
Government ministry officials have until March to add up their worth and send it to anti-corruption authorities.
Some NGOs say they fear the law will be used as a tool of repression against anti-government groups.
Thai lawmaker Panich Vikitsreth and Narumol Jitrawarattana, were released after they paid their bail, approximately at $250 each.