Several hundred demonstrators marched through the capital, waving red flags and chanting slogans in protest at Nato's bombing of the Chinese embassy in Belgrade last Saturday.

Shots were fired after the demonstrators broke through the first of two security cordons set up around the compound. There are no reports of injuries.

The crowds, some wearing white t-shirts with the American flag superimposed with a swastika, carried banners daubed with anti-US slogans and shouted "Kill Americans."

Cambodia condemns bombing

The Cambodian prime minister, Hun Sen, has condemned the bombing and appealed for an end to Nato's air campaign against Yugoslavia.

Soldiers fired warning shots

However, the Cambodian government said it had not authorised the march, which was organised by the Chinese Chamber of Commerce.

"We don't want to see this kind of problem happening in poor Cambodia. We don't want to damage relations between Cambodia and foreign countries," said Interior Ministry spokesman Khieu Sopheak.

The Chamber of Commerce took out a half-page advertisement in the English-language newspaper, the Cambodia Daily, strongly protesting against "Nato's atrocity".