A 20 year old Tel Aviv resident was stabbed near Rosh Ha'ayin on Saturday evening.
The stabber and the victim were driving on Road 5, when the stabber's car hit the victim's vehicle from behind.
Both drivers stopped by the roadside to examine the damage, and in the discussion that evolved the offender attacked the victim.
The victim, seriously wounded, was taken to Beilinson Hospital in Petah Tikva. His condition is critical but stable. Police were searching for the criminal.