A broken glass bottle lobbed on to the pitch caused the start of the second half at Ibrox to be delayed — a move that was branded "shameful".
Joe Hart demanded the shards were cleared off the park before the restart between Rangers and Celtic could go ahead.
Sky co-commentator Ally McCoist branded it an act of "gross stupidity" while colleague Andy Walker also hit out at the missile that came from the home end.
Kick-off for the second period was delayed by three minutes as Rangers tried to get back into the game which they were behind 2-1, with ground staff coming on to remove the objects.
Walker believes the moment of madness is damaging the reputation of the world famous derby.
The former Celtic striker said: "We're trying to sell this game around the world. Shameful anyone would throw anything on to the pitch, let alone a broken bottle."
Dismayed Rangers hero McCoist added: "You think nothing would surprise you any more but dearie me. Gross stupidity."
Chris Sutton waded in on Twitter: "Absolute scumbags throwing glass bottles on to the pitch. How low can some people go? This is how this game will be remembered now."
Missiles were later thrown in the direction of Jota as he prepared to take a corner.
