Bekele storms to 10,000m victory
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Ethiopia's Kenenisa Bekele won the men's 10,000m gold, creating an Olympic record of 27 minutes 1.17 seconds, as compatriot Sileshi Sihine took silver.
Micah Kogo of Kenya secured bronze, but Ethiopian veteran Haile Gebrselassie could only finish sixth, ending his dream of a third Olympic gold medal.
Bekele, 26, controlled the last lap before powering home by a distance to clinch his second Olympic gold medal.
It is the fourth successive major title for the three-times world champion.
Bekele is also considering an appearance in the 5,000m but will decide after Sunday's race.
"It's was a very big goal for me to win this title - my dreams have come true to win tonight," said Bekele.
"The race was fantastic, there was no pacemaker and everyone was pushing. No-one could push any harder.
"It is a big gift. I will now try to run the 5,000 metres. It is not easy to run the two events. It will be a strong race."
Dibaba wins women's 10,000m title
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Video - Dibaba wins Olympic 10,000m
Ethiopia's Tirunesh Dibaba won the women's 10,000m in a new Olympic record by beating Turkey's Elvan Abeylegesse in a thrilling battle in Beijing.
During a fast race which was stretched from the start, the pair were neck and neck going into the final six laps.
But at the sound of the bell, world champion Dibaba kicked out and held on to win in 29 minutes 54.68 seconds.
America's Shalane Flanagan took the bronze medal while Britain's Jo Pavey came 12th in a new personal best.
The winning time was the second-fastest ever and Pavey, who finished fourth at last year's World Championships, slipped off the main group with 11 laps to go.
"I'm disappointed, you feel like you've made a fool of yourself," Pavey told BBC Sport. "It was such a blistering pace.