Veteran crew chief Nick Harrison died overnight at 37, Kaulig Racing announced Sunday morning.
Harrison died sometime after Saturday's Xfinity Series race at New Hampshire Motor Speedway at Loudon, N.H. No details were released.
"It is with heavy hearts that we announce the passing of Nick Harrison, our beloved crew chief of the No. 11 car at Kaulig Racing. Please keep Nick's family in your thoughts and prayers at this time," said the racing team's statement.
Harrison has been part of racing teams since 2006. According to NASCAR.com, he was the lead chief for 120 NASCAR Cup Series races from 2010-14 and 184 Xfinity races.
NASCAR said Harrison has five career victories -- including a NASCAR win with Kurt Busch. He won four Xfinity races -- three with Austin Dillon and one with Paul Menard.
Harrison was in his first season with Kaulig Racing. On Saturday, Harrison was the crew chief for Justin Haley, who finished 13th.
"Not just a crew chief, but a friend to everyone who knew him," Haley said in a tweet on Sunday morning. "I, and everyone at Kaulig Racing are devastated. He will be greatly missed."
Busch was one of the many drivers who expressed their condolences.
"We all lost a friend last night. We love you Nick Harrison. You were a leader, and a great friend to all. Nick really helped me rebuild my career when I was at a low point. RIP," Busch tweeted.
--Field Level Media