Cambodian leader Hun Sen has swept all seats in parliament after holding an election with no opposition, as the country settles into one-party rule and a government that could face questions of legitimacy on the world stage.

Phnom Penh - Cambodia's ruling party said it had won a landslide in Sunday's one-horse election, an expected outcome after the main opposition was banned paving the way for leader Hun Sen to prolong his 33 years in power.