Sam Rainsy Party officials said he was being arrested because of his politics and called for his immediate release.
A group of the protesters gathered in front of the Royal Palace for the second time on Monday.
The Cambodian People’s Party swept the commune elections on Sunday, winning nearly 1,600 of 1,633 commune chief positions.
On Thursday, they saw the spirits of Yay Mao and Ta Prak as their last resort, as residents burned chili peppers with salt and chanted.
The ministry prohibited five affiliate stations in Cambodia from running Khmer-language RFA and VOA programs last Saturday.
A Ministry of Information official confirmed Monday the government had banned broadcasts of VOA and RFA during the election Sunday.
Ten parties will field candidates for nearly 11,600 seats across more than 1,600 communes in Sunday’s election.
As Cambodians prepare for local elections Sunday, voters say petty corruption in their villages is very much on their mind.
Protesters, many of whom were the children of the arrested women, sang songs or shaved their heads in a sign of desperation.
Leang Sok Choeun was sentenced alongside two other men for reportedly distributing anti-government leaflets in 2009.
Although violence against writers and academics in Cambodia has decreased in recent years, many say they still face strong censorship.
A group of 23 human rights NGOs issued a statement Tuesday condemning ongoing violence by state security forces against civilians.