Four gunmen were killed by security officers in a special operation on the Kavkaz federal highway in the Karabudakhkentsky district, Dagestan, Itar-Tass learnt on Wednesday at the press service of the Dagestan branch of the Russian Federal Security Service. According to the press service, “an attempt was made to stop a Lada car to check documents on Wednesday at 01.00 not far from the village of Manaskent 30 kilometres away from Makhachkala". “The car did not stop, while unidentified people opened fire from the motor vehicle on law enforcers,” the press service specified. All the four, including the driver, were killed by return fire. Security officers found a submachinegun, a pistol and ammunition inside the car. There were no casualties among security officers.