The visiting supporters repeatedly taunted their counterparts about the Hillsborough and Heysel stadium disasters during the Europa League tie on Merseyside on Thursday
The songs did not stem from a small minority in the away end, with the taunts very clearly audible inside the stadium and drawing boos from the home crowd.
Liverpool fans sang a chorus of "Fergie’s right, your fans are sh*te", to which the United section responded: "The Sun was right, you’re murderers."
Stain on that half was the utterly disgraceful chants from the away end. And no, it was not a minority. And yes, no place for it anywhere.— Melissa Reddy (@MelissaReddy_) March 10, 2016
It was followed by a string of other unacceptable songs about the Hillsborough and Heysel tragedies.
The chants are the latest episode in a long line of what Liverpool fans' website The Anfield Wrap termed "terrace tragedy tennis" between the fanbases of English football’s greatest rivals.