Eyup Tepe, the governor for Kars where the attack took place, said the shooting was not political or terrorism-related. He said the gunman, identified as 33-year old Veysi Erim, was employed as a sociologist at the agency and was receiving treatment for psychological problems.
"It is believed that Erim who was suffering from psychological problems and was receiving treatment, carried out the attack during a state of hysteria," a statement from Tepe's office said.
Tepe said the dead included the agency's manager and five employees. One other employee was injured in the attack.
The private Dogan news agency said there were some 40 employees at the agency at the time of the attack.