A STUN gun was fired at a man in a frightening road rage attack.
The 35-year-old victim was driving his white Vauxhall Combo van on Slaithwaite Road in Dewsbury with his nine-year-old son in the passenger seat at 2pm on Monday.
They came across two mini roundabouts where two vehicles were stopped - a black Range Rover and a light green R-registered Renault Laguna.
It is not clear if they had been involved in an accident.
The victim started to be followed by the Laguna and was stopped on Savile Road.
The Laguna driver got out, went to the van and fired the stun gun through the open window.
The victim suffered an eye injury and needed treatment at Dewsbury District Hospital.
Detectives believe the weapon used was a Taser gun, which uses an extremely high voltage electric charge to stun its target.
A force spokeswoman said the incident began when the man was driving along Slaithwaite Road.
As he approached, the Range Rover drove away but the Renault followed him round the roundabout and forced him to stop outside a church.
The spokeswoman said: "The driver and sole occupant of the Laguna got out of the car, went across to the complainant's van and fired what was believed to be a Taser gun through the open van window at the complainant."
She said the driver was taken to Dewsbury District Hospital where he was examined and later released.
His nine-year-old son witnessed the incident from the front passenger seat of the van.
"The boy was shocked by the incident but was unharmed," said the spokeswoman.
The attacker is Asian, in his late 30s or early 40s, about 5ft 8ins tall with his black hair brushed back. He wore glasses.
Anyone who saw what happened should contact Dewsbury police station on 01924 431059.