Three California Highway Patrol officers were injured in a fiery crash on the 105 Freeway Thursday morning that prompted an hourslong closure in Downey.

The crash was reported about 1:30 a.m. in the eastbound lanes near Lakewood Boulevard.

The officers had been responding to an earlier crash when they were struck by an SUV, CHP Officer Kevin Tao said.

A witness said the CHP vehicle was helping conduct a lane closure on the freeway when it was struck by a vehicle going 90 to 95 mph.

“They flew right past me,” Robert Martinez said. “The driver applied no brakes and went straight into the CHP car.”

The civilian vehicle flipped over after the crash, Martinez said.

Tao could not confirm the speed of the SUV at the time of the crash but did say two officers were inside the cruiser and a third was standing outside at the time of the crash.

The officer who was standing outside the vehicle was transported to a local hospital with serious injuries, Tao said.

The two officers inside the vehicle were also transported but only suffered moderate injuries, he said.

Video from the scene showed the CHP vehicle engulfed in flames a short time after the collision.

The driver of the SUV, described only as a female, was taken into custody on suspicion of DUI following the crash, Tao said.

The driver was the only occupant of the SUV.

The eastbound side of the 105 Freeway was closed for the investigation.

There was no word on when the freeway would reopen.