PARIS, JULY 16 -- Edwin Moses fell on a rain-slickened track and lost the 400-meter hurdles for the second time in six weeks, and Said Aouita of Morocco set a world record in the 2,000 meters at the Paris International track and field meet today.

Moses, who had a 122-race winning streak ended last month in Madrid, appeared to have a solid lead despite hitting the fifth hurdle, but hesitated as he approached the ninth hurdle.

He hit the barrier soundly, then lay on the ground while Amadou Dia Ba of Senegal won the race in 48.89 seconds.

Tears streamed down Moses' face as he walked off. Moses, who lost for only the second time in nine years, said he was not injured.

"I'm okay, but I'm disappointed," he said.

Danny Harris, who ended Moses' winning streak June 5, was second in 48.98.

The light rain that fell most of the day stopped just before the 2,000 meters.

James Mays of the United States set the pace over the first 1,000 meters of the race. But Canada's Roy Reed, who was to push the leaders over the last 1,000 meters, faltered after only 300.

"From that point on, I knew I had it," Aouita said. "I was able to keep the rhythm and accelerate on the final straightaway.

"In the last lap, I accelerated to the maximum and I knew I would beat this record."

Aouita, already the record-holder in the 1,500 and 5,000 meters, won in 4 minutes 50.81 seconds -- more than a half-second better than the previous mark of 4:51.39 set by Britain's Steve Cram in Budapest on Aug. 4, 1985.

"I am very sorry for Cram, who is a very good friend of mine," Aouita said. "I'm sorry to have broken his record, but he can always try to do better than I."

Pascal Thiebaut of France was a distant second in 4:56.70.