Ethiopia's Yomif Kejelcha has reclaimed the men's half marathon world record, finishing the race in 56 minutes 51 seconds. Kejelcha previously held the record but lost it to Jacob Kiplimo earlier this year. Kiplimo's time of 57:20 in Lisbon was surpassed by Kejelcha's new record.

The 29-year-old athlete, who also holds the world record for the men's 10,000m road race, achieved this feat in Buenos Aires. His new record time is pending official ratification. Kejelcha's achievement adds to his impressive track record in long-distance running. Read more racing coverage.

Kejelcha's accomplishment is significant for runners aiming for top performances in half marathon events. His new record time of 56 minutes 51 seconds sets a new benchmark for competitors worldwide. Related: Ethiopia’s Kejelcha reclaims half-marathon world record.

This original Runner World brief is based on reporting from BBC Sport Athletics. Visit the source for its complete reporting, context and any later corrections.