A 22-year-old Camp Pendleton Marine died after he lost control of a speeding motorcycle on city streets in Oceanside, authorities said. The Marine was riding a 2024 Kawasaki Ninja Sport motorcycle when he sped past a vehicle on Avenida Del Oro and lost control around 6:19 p.m. Tuesday, according to the Oceanside Police Department. The motorcyclist was ejected and suffered major injuries, OPD said. The rider was rushed to Tri-City Medical Center where he went into cardiac arrest and died at 7:16 p.m. The identity of the motorcyclist is being withheld pending notification of next of kin but Oceanside police confirmed he was an active-duty Marine stationed at Camp Pendleton. The OPD’s Major Accident Investigation Team conducted an investigation.