Six arrests made 'so far' after Old Firm clash at Ibrox
Police said they are continuing to monitor events following Celtic's 3-2 derby win
Six arrests have been made "so far" following the Old Firm derby at Ibrox on Sunday.
Police said they are continuing to support post-match policing in the wake of Celtic's 3-2 away win.
The national force previously announced there would be a "notable increase" in the number of officers in the area and around Glasgow for the match.
It came as a Rangers fan group called Union Bears organised a march to Ibrox ahead of what it dubbed in promotional material the "match against the Fenians".
Pictures and video surfaced online of hundreds of Rangers fans on the march, which was not authorised by the council.
The footage showed some marchers lighting up flares and covering their faces, with Glasgow councillor Mhairi Hunter describing the behaviour as "lawless and intimidating".
Police Scotland tweeted: "We continue to support the post-match policing operation for the Rangers v Celtic game. Six arrests so far.
"Our service centre and control room staff are very well prepared for a busy night but let's hope everyone behaves."
The arrests were made in and around Ibrox stadium and were for "minor public order offences", police said.
Scottish champions Celtic went behind just three minutes into the clash when Josh Windass struck following a mistake from Dedryck Boyata, but equalised soon after when Tom Rogic found the top corner from the edge of the box.
Rangers regained the lead through Daniel Candeias but Celtic responded once more when Moussa Dembele lofted a chip over Wes Foderingham just before the break.
The visitors spent the last half hour a man down when Jozo Simunovic saw red after he was adjudged to have elbowed Alfredo Morelos.
But they were to take all three points from Ibrox when substitute Odsonne Eduoard curled a terrific effort into the top corner minutes after coming on.