Hibs will review CCTV footage after a glass bottle was thrown at grounded Rangers defender Borna Barisic at Easter Road.
The Croat lay on the pitch after a red-card challenge from Ryan Porteous during Rangers 3-0 Scottish Premiership win on Friday night.
While he was floored, a glass bottle was among a series of objects hurled at Barisic – behaviour which has been condemned by Hibs manager Jack Ross.
He said: “I say this as a human being – I can’t get my head around why anyone would make the decision to throw a glass bottle at another human being.
“I just don’t get it. There are people who argue that behaviours on the pitch or around the pitch affect that. That’s garbage. Someone who does that deserves the consequences that come with it.”
Hibs released a statement, which said: “We are naturally disappointed at the actions of a few, particularly as we appealed for supporters to behave responsibly on the eve of the game.
“We invested significantly in enhanced CCTV systems and we’ll review footage from all of the sections concerned to identify any individual involved in unacceptable conduct.”
The missile came from the same section of the East Stand from which a pitch invader leapt to confront Rangers skipper James Tavernier last March.
That incident occurred just a week after Celtic winger Scott Sinclair was targeted with a Buckfast bottle, again from the area in the corner next to the away support.
Hibs chief executive Leeann Dempster said she would consider shutting the rogue section if the fans did not clean up their act in the wake of those two disgraceful episodes.
Rangers boss Steven Gerrard said it is up to the Leith outfit to explain how they are going to tackle the problem but praised his players as they refused to react, completing a win earned thanks to goals from Ryan Kent, Joe Aribo and Jermain Defoe.
“It was bottles, lighters, all kind of objects,” said Gerrard.
“It’s not my business. It’s down to Hibs to deal with that.
“We don’t want to see that in any stadium. We want the players to be safe and we want the fans to be safe.
“We’ve spoken to our players on numerous occasions and told them to keep their cool in these situations. I’m very pleased with their behaviour.”
However, Gerrard admitted both his backroom team and the Hibs bench had overstepped the mark as they squared up when Porteous lunged into Barisic, earning a straight red which rules him out of Thursday’s Edinburgh derby.
Rangers coach Tom Culshaw and Hibs assistant John Potter followed the defender down the tunnel after they were also dismissed by referee Nick Walsh.
Gerrard added: “I think both benches won’t be proud of seeing that back. That’s not what it’s all about. We need to control emotions better.
“It was a straight red card. We were disappointed with Hibs trying to defend that.
“But I’m very happy. We were excellent until the red card, very dominant.”