Sven Kramer and Ireen Wüst on Sunday entered the record books in retaining their world allround speed skating titles at the championships in Hamar, Norway.

Kramer took the title for the sixth time, the first time anyone has achieved such a record.

Wüst took the title for the fourth time, making her the most successful Dutch allround skater ever, Nos television said. Dutch skater Diana Valkenburg took silver.

The men’s competition involves races of 500m, 1,500m, 5km and 10km; the women’s 500m, 1,500m, 3km and 5km.