MONTEREY, Calif. (AP) — Two Spanish racers were killed in a chain-reaction crash on the first lap of a World Superbike race at Mazda Raceway at Laguna Seca.

Monterey County Sheriff’s Officer spokesman Cmdr. John Thornburg on Monday confirmed the deaths in Sunday’s crash. The Monterey Herald reports thunderstorms had drenched the track ahead of the race.

READ MORE: Forward Progress Stopped In Nelson, Sandra Fires In Butte County

Race organizers MotoAmerica identified the dead as 35-year-old Bernat Martinez and 27-year-old Daniel Rivas Fernandez. Both were taken to hospitals, where they later died.

READ MORE: Sacramento Police Investigate Officer-Involved Shooting

Thornburg said his office is not investigating the crash at Sunday’s second MotoAmerica Superbike/Superstock 1000 race, which appears to be an accident.

MORE NEWS: Sean Murphy's 2 RBIs Lift Oakland To 3-1 Win Over Mariners

MotoAmerica president Wayne Rainey sent condolences to the families in a statement released by the organization.