DERA ISMAIL KHAN: At least two people were killed as unidentified gunmen opened fire on a security check post in Daraznida Moore of Dera Ismail Khan (DIK), ARY News reported on Saturday.According to details, the police met an encounter with the armed men in the area, which resulted in death of two persons and bullet injuries to two other.The police personnel stationed at the post returned the fire, forcing the attackers to flee. Security men remained unhurt during the attack.