Cambodia's election committee has handed victory in hotly disputed polls to the ruling party of Prime Minister Hun Sen, despite allegations of widespread voter fraud.

The Cambodian People's Party (CPP) of the strongman leader won 68 seats to 55 for the opposition Cambodia National Rescue Party (CNRP), according to a notice on the website of the country's government-appointed election committee.

The opposition has contested the outcome of the July 28 election, but its legal challenges were rejected.

The results end the legal avenues open to the opposition to contest the poll, despite its allegations that major voter fraud distorted the result and a mass rally of about 10,000 supporters on Saturday calling for an independent probe into the election.

According to preliminary official results from the National Election Committee (NEC), the CPP won 3.2 million votes to the CNRP's 2.9 million, although the body was yet to confirm those figures on Sunday.

Cambodia has been in a political deadlock since the July poll, with a defiant Hun Sen vowing to continue in power despite vociferous calls from opposition leader Sam Rainsy for a probe into voter fraud.

Experts say the result is a blow to the CNRP which is adamant it had won the election, however it also represents a significant parliamentary gain on the last election.

Hun Sen, 61, a former Khmer Rouge cadre who defected and oversaw Cambodia's rise from the ashes of war, has vowed to rule until he is 74.

His government is regularly accused of ignoring human rights and suppressing political dissent.

Source: Agencies