The suspect is still at large.

The California Highway Patrol (CHP) is asking for help locating a semi truck driver who reportedly stabbed two other truck drivers multiple times before speeding away.

The attack took place around 7:30 a.m. on Wednesday, August 28 in northwestern Fresno, California.

CHP says that two truck drivers traveling on Highway 99 pulled off near the southbound Herndon on-ramp to check their loads when a third truck driver also pulled off the highway and parked between the two trucks.

An argument ensued and the third truck driver pulled out a knife and began stabbing the other two drivers multiple times.

An off-duty Fresno County Sheriff’s officer spotted the altercation and pulled over, displaying a firearm to the attacker.

The suspect got back into his truck and fled the scene southbound on Highway 99, the Fresno Bee reports.

Both truck drivers were transported to the hospital for treatment of moderate injuries.

CHP is asking for public help locating the suspect truck driver. He is described as a Hispanic man in his 40s with short hair and multiple tattoos on his face, arms, and chest. Police say that he was driving a 2015 or older white Freightliner with a white trailer.

If you have information, you’re asked to call Fresno CHP at 559-262-0400.

For more, see the report below.