NASCAR calls car fires 'unacceptable' after Harvick inferno

FILE - Joey Logano watches during qualifications for the NASCAR Cup Series auto race at Indianapolis Motor Speedway, Saturday, July 30, 2022, in Indianapolis. The Next Gen has achieved some of its goals but has also raised safety concerns. Chris Buescher and Joey Logano both had car fires at the Indianapolis road course, Chase Briscoe's car caught on fire and then Kevin Harvick's was practically destroyed by flames Sunday night. (AP Photo/Darron Cummings, File)

FILE - Kevin Harvick speaks during NASCAR Daytona 500 auto racing media day at Daytona International Speedway, Wednesday, Feb. 16, 2022, in Daytona Beach, Fla. NASCAR heads into its second playoff race investigating a spate of car fires that has at least one championship contender fuming. Kevin Harvick lashed out at NASCAR and the new Next Gen car after it inexplicably caught fire in the playoff opener at Darlington Raceway. (AP Photo/John Raoux, File)

Erik Jones (43), Ross Chastain (1), Ryan Blaney (12), Alex Bowman (48), Martin Truex (19), Kevin Harvick (4) and Ricky Stenhouse Jr. (47) compete in the NASCAR Southern 500 auto race Sunday, Sept. 4, 2022, in Darlington, S.C. Jones won the race after taking the lead from Kyle Busch when Busch blew a motor with 30 laps remaining in the race. (AP Photo/Sean Rayford)