KATHMANDU (AFP) - A trio of European climbers have made peace with a group of Nepalese guides working on Mount Everest after a "terrifying" high-altitude brawl that sparked a police investigation, officials said Monday.

Ueli Steck, a Swiss national famed for his climbing records, and Simone Moro of Italy, who has climbed the world's highest peak four times, had a bust-up with the guides near the summit of the world's highest mountain on Saturday.

An American eyewitness, speaking to AFP by telephone on condition of anonymity, said Steck, Moro and British photographer Jonathan Griffith were asked to wait on the mountain while the group of Nepalese rigged up some ropes.

The witness said the Europeans, who were trying to climb the 8,848-metre mountain by a new "undisclosed" route without supplementary oxygen, ignored the request and carried on.

"The Sherpas told the team not to climb above them while they were fixing the ropes but they did it anyway. Then some ice fell and hit the Sherpas, which made them angry," said the eyewitness.

Later in the day, a furious group of Nepalese stormed up towards the climbers' tents and pelted them with stones until the men came outside, after which a loud argument ensued and punches were allegedly thrown.

"It was terrifying to watch - they nearly got killed," the eyewitness said.

Moro, in a statement on his website describing events, said it was "highly unlikely" that any ice had fallen as a result of his group. He said he had been attacked by an "out-of-control mob".

"They became instantly aggressive and not only punched and kicked the climbers, but threw many rocks as well," said the statement, which indicated the clash took place at Camp Two at an altitude of 6,500 metres.

The statement added that Moro's group had caused no interference for the Sherpas who were fixing the ropes, which they do each year so that hundreds of other summit hopefuls can access the mountain.

Police near the world's highest mountain were investigating the incident and mediation meetings between the climbers and the local Sherpas took place on Monday afternoon, local officials said.

"Both parties apologised to each other and ended the meeting amicably," Surendra Sapkota, an official at Nepal's tourism ministry said.

"The three men have decided to resume their ascent," he said, adding that the Nepalese government would issue a code of conduct for climbers and mountain staff to prevent future fighting.

Liz Hawley, an American journalist and renowned Everest historian, told AFP that this sort of violent incident was "very, very rare".

The Europeans descended the mountain immediately after the fight and Moro continued to Lukla, the gateway airport town for Everest, where he spent a night in hospital.

Raj Kumar, a police constable in Lukla, told AFP that Steck had no sign of any injuries and he had returned to base camp by helicopter.

More than 3,000 people have climbed Everest, which straddles Nepal and China, since it was first conquered by Edmund Hillary and Tenzing Norgay in 1953. Every year, hundreds more set out in April to attempt the climb.

Nepal's tourism ministry announced Monday that a Chinese climber had gone missing after climbing the world's fifth-highest mountain, the 8,481-metre Makalu.