Confirming the attack, the provincial police spokesman Zia Durani said, "A base of the security forces was targeted in Maruf district."
Durani also stated that attack also injured at least four people. And those killed were members of the intelligence, national and border police personnel.
Taliban insurgents group has claimed the responsibility for the attack.
Earlier this month, a suicide bomber had targeted a convoy of Romanian forces' in southern province of Kandahar.
The suicide bomber blew up his explosive-laden car close to the convoy causing damage.
Recently, Taliban insurgents have stepped up their insurgency activities in Kandahar province and the growing insurgency comes amid deteriorating security situation in the key southern provinces including Helmand which lies close to Kandahar province. (ANI)