User blog comment:Tyrannoraptor/Can Balrogs be hurt or killed with physical damage?/@comment-26327335-20150510081155

Ecthelion's sword Orcrist was said to have done hurt to their fire, so it presumably pierced through them, and he killed three Balrogs like that, and then he drove his helmet-spike into Gothmog's chest, severely injuring him before they drowned in the fountain. Tuor with his axe killed five of them by hewing them down. Glorfindel stabbed another Balrog with a dagger before it fell down. So... immune to physical damage? Not really.