SAN DIMAS — An Ontario man died Saturday after jumping out of an SUV as it traveled at about 65 mph on the 10 Freeway, authorities said.

Javier Gonzalez, 28, suffered severe injuries in the incident, which took place just after 4 p.m. on the eastbound 10 Freeway at Via Verde, California Highway Patrol Sgt. Alex Antillon said.

He died at a hospital a short time later, officials said.

Gonzalez was a rear passenger sitting on the right side of a Chevrolet Suburban in the fast lane of the freeway when, for reasons that remained under investigation, he tumbled from the SUV, the sergeant said. He ended up lying in the No. 2 traffic lane, but was not struck by any additional vehicles.

The initial investigation indicated Gonzalez intentionally jumped from the SUV, CHP Sgt. Steve Licon said.

“We’re not considering it an accident, because the door, the door latch, was functioning properly,” he said.

But officials were still looking into exactly what Gonzalez’s intentions were, Licon added.

“There’s no suicide note or anything like that,” he said. “We don’t know what he was thinking.”

The circumstances that led up to the incident remained under investigation, however Gonzalez was not believed to have said or done anything unusual prior to leaping from the SUV, Licon said.

It was not clear Sunday whether Gonzalez had a history of mental illness.

The SUV was being driven by Gonzalez’s aunt, a 43-year-old Ontario woman, Licon said, and another male relative was also riding in the vehicle.

Officials shut down the three left lanes of eastbound traffic as they investigated the scene, and briefly closed all traffic on the westbound side of the 10 Freeway as a helicopter landed to rush the severely wounded man to a hospital. All lanes were reopened by 5 p.m.

The incident is being investigated by the Baldwin Park office of the CHP.