Cambodia's Senate election for the fifth legislative term kicked off on Sunday, with four political parties taking part in the race, a National Election Committee (NEC) spokesperson said.

"All 33 polling stations were open at 7:00 a.m. and will be closed at 3:00 p.m.," accoding to Dim Sovannarom, a NEC member and spokesperson.

The four political parties contesting in the election are the ruling Cambodian People's Party (CPP), the Funcinpec Party, the Khmer Will Party, and the Nation Power Party, he said.