Ally McCoist branded it a "disgrace", while Jermaine Jenas said Newcastle were "robbed" as a controversial late penalty decision denied Eddie Howe's side a memorable victory at Paris St-Germain.
Aleksander Isak's first-half goal in Tuesday's Champions League tie had looked set to stun the hosts, as missed chances and some big saves from Nick Pope gave the visiting fans hope that their side were going to complete a double over the French champions in Group F.
But, in the eighth minute of stoppage time, Ousmane Dembele's cross appeared to strike Tino Livramento's body and the ball bounced up on to his arm.