UPDATE 6:01 p.m.: Three lanes, including the carpool lane, were reopened just before 6 p.m., according to the California Highway Patrol.
UPDATE 4:08 p.m.: The Eastbound 60 will not be reopened until 6 p.m. at the earliest, according to CHP officials, the Los Angeles Times reports.
See video of the accident scene below:
View more videos at: http://nbclosangeles.com.
UPDATE 3:57 p.m.: As of 3:55 p.m., the carpool lanes were still closed, according to the California Highway Patrol.
UPDATE 2:49 p.m.: The carpool lanes are expected to reopen soon on the eastbound 60 Freeway, said California Highway Patrol Officer Ming Hsu.
UPDATE 1:43 p.m.: Two of the injured were airlifted with serious injuries, California Highway Patrol Officer Vince Ramirez told KPCC. Ramirez said the crash would affect the afternoon commute and that commuters were being advised to consider using alternate routes.
"We understand that it began with two big rigs originally, and the third big rig collided into the other two big rigs that had initially collided. It was more or less a chain reaction type incident," Ramirez said.
UPDATE: 1:13 p.m.: Three trucks and a car have collided on a the 60 Freeway in Diamond Bar, killing one person and leaving at least two in critical condition. The eastbound lanes are expected to be closed until about 5 p.m. Friday, causing a major headache for the afternoon commute.
Los Angeles County fire Inspector Tony Imbrenda said the wreck occurred about 11 a.m. in the eastbound lanes.
He says one person was dead at the scene and two others had to be removed from the wreckage and are listed in critical condition.
Television reports showed one tractor-trailer truck on its side on the freeway about 25 miles east of downtown Los Angeles.
The overturned rig appears to have been carrying produce, which scattered across the freeway when it flipped.
The freeway was closed in both directions for a time. The westbound side reopened after a helicopter-ambulance took off with the injured.
NBC LA reports that two more people are hurt and trapped in the wreckage. The station reports that the crash involved two big rig trucks and a box truck.
Footage from a helicopter showed one of the big rigs on its side in the middle of the eastbound freeway lanes. A box truck and another big rig with damage to the back of its trailer were parked on the shoulder.
The eastbound lanes are likely to remain closed until about 5 p.m., according to the California Highway Patrol. Boxes of bananas spilled from the overturned big rig.
PREVIOUSLY: All lanes of the eastbound 60 Freeway in Diamond Bar were shut down Friday morning after three big rigs collided, KNX reports.
The call came in shortly after 11:15 a.m., CBS Los Angeles reports, after the trucks crashed near Diamond Bar Boulevard. The big rigs included a produce truck.
One person was pronounced dead at the scene by fire officials, with two others in critical condition, according to CBS L.A.