American Grant Fisher breaks his second world indoor record in six days with a new mark in the 5,000m in Boston.

Norwegian Jakob Ingebrigtsen broke the world indoor mile record at the World Athletics Indoor Tour Gold meeting in Lievin, France, beating last week's mark set by American Yared Nuguse.

Jakob Ingebrigtsen has smashed the indoor world records for both the mile and 1500m in a race at the World Athletics Indoor Tour Gold meeting in France.

Jakob Ingebrigtsen ran a time of 3:45.14 for an indoor mile in Liévin, France, beating Yared Nuguse’s record set five days before by more than a second.

(Reuters) -American Grant Fisher smashed the world indoor 5,000 meters record at the Boston University David Hemery Valentine Invitational on Friday, just a week after setting the indoor 3,000 meters record.

Norway's Jakob Ingebrigtsen set a world record in the indoor mile Thursday, beating Yared Nuguse's mark set just five days earlier.

Ingebrigtsen — who ran 3:29.63 in the 1500m and 3:45.14 in the mile — claimed Nuguse's mark just five days after the American made history.

On the indoor track in Liévin, France, Jakob Ingebrigtsen did not miss his start to the season. The 24-year-old Norwegian asked and received top pacers and then stormed to a new world record in the mile himself.