At least two security personnel were killed and two others injured in a militant attack on a check post here in Ghallanai early Wednesday morning. According to security sources, militants attacked the check post with rockets and other heavy weapons in Ghalnai area of Mohmand Agency at 2:00am. The security forces retaliated the attack and fire exchange continued for more than two hours forcing the militants to flee. Four security men were injured during the gunfight and were rushed to hospital but two of them succumbed to their injuries before reaching the hospital. The others two were shifted to Peshawar hospital due to critical bullet wounds. The security forces condoned off the entire after the attack and launched search operation but no arrest has been made.