Cambodian Opposition Rejects Election Results

Demanding investigation after long-serving Prime Minister Hun Sen's Cambodian People's Party won

Phnom Penh, Cambodia (CNN) -- The opposition party in Cambodia has rejected the results of the country's national election, which handed another win to long-serving Prime Minister Hun Sen.

The Cambodia National Rescue Party (CNRP) said Monday the weekend balloting was marred by irregularities, and demanded an investigation.

Cambodians went to the polls Sunday.

According to preliminary results released by the national election commission, the opposition won 55 seats. But the number wasn't large enough to unseat the ruling Cambodian People's Party, which won 68 seats.