NATO forces in Afghanistan today said they have killed a large number of Taliban fighters and captured a rebel chieftain after a raid on an insurgent hideout in the southern province of Helmand. <br/><br/>In a statement, NATO's International Security Assistance Force (ISAF) said the troops called in air support during running gunbattles in the province's troubled Baghran district which erupted after rebels attacked soldiers with machine guns and rockets, it said. <br/><br/>It said the Taliban chief of Naw Zad, another restive district of Helmand, was injured and detained following the fighting. The statement did not give the details of the number of insurgents killed.