Kenya's Peres Jepchirchir has won the world half-marathon world title and broken her own women's-only world record in the Polish seaside city of Gdynia, while Uganda's Jacob Kiplimo has secured the men's title.
Jepchirchir set a new landmark, completing the 21.1-kilometre distance in 1 hour 5 minutes 16 seconds.
Germany's Melat Yisak Kejeta took silver, just two seconds behind the winner, having set a new European record for women-only races of 1:05.18.
Ethiopia's Yalemzerf Yehualaw took bronze a further second behind.
Jepchirchir's triumph was her second world title over the distance after her 2016 win in Cardiff.
"It's unbelievable," said Jepchirchir. "I did not expect that I would beat the world record, but I realised that it could happen when we passed 20km. It was a little bit windy, but the course was good for me."
In the men's race, Kiplimo caused a big shock by winning gold in a championship record 58:49.
"I feel great, it was my first time at the world half marathon championships and I won!," said Kiplimo. "It is hard to explain, because I am full of emotions."
Kenya's Kibiwott Kandie came in five seconds behind to take silver ahead of Ethiopia's Amedework Walelegn.
Kiplimo's compatriot Joshua Cheptegei, a massive favourite ahead of the race, finished fourth, missing out on a medal by thirteen seconds.
Cheptegei, who recently set world records in the 5,000 metres and 10,000m, was making his debut over the distance and seeking to become just the second man to win world titles in cross country, on the road and on the track.
"I couldn't give more than that," said Cheptegei, who set his 10,000m record in Valencia just 10 days ago. "I have been training more for 5,000 metres and 10,000 metres so I was not well prepared for it, but I'm very happy - running a sub-60 is really special for me."