UPDATE 6:40 P.M.: The sole occupant of the pickup truck was ejected from the truck into a nearby body of water, fire officials said.

The tracks pass over the Middle River near Orwood and Fallman roads, according to maps of the area. The truck then landed on a second victim who was on a raft in the water, according to fire officials.

The person on the raft and the truck’s occupant were both taken to John Muir Medical Center by helicopter with critical injuries, fire officials said.

BRENTWOOD (KRON) — An Amtrak train with 145 passengers on-board hit a truck in Brentwood Thursday afternoon, seriously injuring two people.

The train was on its way to Oakland when it was hit just before 2:45 p.m.. The truck was pushed into the water.

It happened after the Orwood Resort, police said. According to the California Highway Patrol, the truck was towing jet skis, and it stopped on the train tracks near Orwood Road and Fallman Road in unincorporated Contra Costa County.

It is not clear why the truck stopped on the tracks. Two people were airlifted to John Muir Medical Center in Walnut Creek. At least one person has major injuries, CHP said.

Amtrak spokeswoman Vernae Graham said none of the crewmembers or 145 passengers aboard Amtrak No. 713 reported any injuries. The train originated in Bakersfield and was bound for Oakland, she said.

The truck is currently in about 5 to 6 feet of water, and the tow truck has been called to pull it out.

A passenger on the train, Russell Bierle, said he didn’t feel the impact of the truck, but he did see it sinking slowly into a body of water adjacent to the train.

The tracks run through an area bisected by tributaries and canals. The train had just crossed over a bridge when it struck the vehicle, Bierle said.

He saw someone run to help a person in the truck and heard an announcement saying someone had been seriously injured.

There is no estimated time for when the train will resume service, Graham said.

Stay with KRON4 for updates.