World champion Mo Farah of Britain won the 5,000 metres title and his second Olympic gold medal on Saturday.
Farah, 29, became the seventh man to win both the 5,000m and 10,000m events at the same Olympics with a fast final lap to finish in 13 minutes 41.66 seconds.
''Two gold medals. Who would have thought that?" he said as spectators at the Olympic stadium chanted his name.
Farah stayed out of trouble at the back of the pack before making his move with around two laps to go. He covered the last lap in under 53 seconds and crossed the line to screams and cheers.
Dejen Gebremeskel of Ethiopia finished in a time of 13 mins 41.98 seconds to win silver and Thomas Pkemei Longosiwa of Kenya won bronze.