At least two Pakistani soldiers were killed and one sustained injuries in firing from across the Afghan border targetting an outpost in the restive tribal region.<br/><br/>The incident occurred yesterday when firing hit soldiers in Angor Adda area of South Waziristan, one of seven tribal<br/>region along Afghan border.<br/><br/>Security sources said the firing from Birmal area in Paktika province of Afghanistan targeted a Pakistani outpost.They were part of 56-Punjab Regiment stationed in the area to fight militants. No group claimed responsibility of the attack.<br/><br/>Militants fled across the border to Afghanistan after operations by Pakistani security forces.