Cambodian government opposition leaders led around 1,000 protesters, most of them on motor scooters, through Phnom Penh on Monday, part of an ongoing weekly call for demonstrations over July's election results.
The rally was the second day in a row that opposition supporters gathered to demand a credible investigation into allegations of election fraud or to demand another election.
No clashes were reported with authorities, who had previously said they would not grant permission for a demonstration.
Kem Sokha, vice president of the opposition Cambodia National Rescue Party (CNRP), said young people were riding through the city "to demand a re-election."
Cambodia's election committee said Hun Sen's CPP took 68 seats. It said the opposition CNRP won 55 seats, significantly more seats than it has won in the past.
But the opposition, which has boycotted the new parliament, has said it would have won more seats if the election had been fair.
(This report was produced in collaboration with the VOA Khmer service.)