A British man has been raped at the Oktoberfest beer festival in the German city of Munich.

The man (24) was attacked by two men on Saturday at around 9:30pm local time.

He was urinating in a bush when he was approached by a man who "made it clear that he wanted to have sex with him", Munich police said.

The British man refused, and it was then that his head was jerked back and he was brought to the ground.

Police said that one of the men held the 24-year-old and he was subsequently raped. The men then escaped.

A UK Foreign and Commonwealth Office spokesperson said "We aware of an incident involving a British national and we are providing consular assistance."

The festival attracts millions of visitors from around the world every year.

Munich police say crime is down during the first week of the event compared to last year.

During that first week, an American soldier was shot twice in the leg by police after drunkenly rampaging through a hospital with a fire extinguisher, Abendzeitung, a German newspaper reported.

The 28-year-old had been taken there after suffering a head wound at the festival, according to NBC News.