Superbike racer Tommy Aquino has tragically died in a crash in California, aged 21.
The rider lost his life during a motorcross crash at the Piru MX Park near Santa Clarita yesterday, although details are yet to be released by police.
Aquino was a member of Brent Gladwin's WD40 team and was set to step up to the British Superbikes class for the 2014 season.
His team released this statement: "It is with massive regret that we can confirm the extremely sad passing of our friend and rider Tommy Aquino.
"Tommy was a great asset to our team and a welcome addition to my family. He was enjoying a day with his father and friend and became involved in a freak accident.
"The thoughts of all our team members, sponsors and friends are with his parents Tom and Carrie and brother Michael as this tragic loss is shared."
BSB series director Stuart Higgs also shared his sympathy to the family for their loss and paid tribute to the talented young rider.
He told Bikesport News: "In a short space of time, Tommy had made a great impression on our Championship, with podium finishes and a win in his first season in UK competition.
"Ambitions were high and we were looking forward to his Superbike debut with great anticipation.
"It was obvious that one of the most exciting talents to come out of the USA was beginning to make his mark; it's so desperately sad that we never be able to see the obvious potential fulfilled."
Tributes from the Superbike world poured in on Twitter, with a number of fans sending their message to the American.