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Saints attacker Conor McMenamin headed the well-organised visitors into a shock lead in the seventh minute but the Hoops responded as expected.

Returning midfielder David Turnbull levelled in the 18th minute with a terrific strike before hitting the post with a penalty just before the half-hour mark.

Brendan Rodgers’ men kept working away in the second half and eventually got their reward in the 83rd minute when South Korean attacker Oh, on for Turnbull, fired high past excellent Buddies goalkeeper Zach Hemming for his first goal of the season.

Rodgers’ side had dropped points at the weekend with a goalless draw at Hibernian but the main talking point ahead of the game was the Green Brigade’s ban from Celtic Park for “increasingly serious escalation in unacceptable behaviours”.

The move came after incidents including the fan group’s co-ordination of a display showing solidarity with the people of Palestine at last week’s Champions League game against Atletico Madrid and their absence impacted on the atmosphere.

Rodgers, however, had to get on with winning a game of football and with centre-back Cameron Carter-Vickers rested he brought in Nat Phillips, with Turnbull and winger James Forrest reinstated as Paulo Bernardo and Daizen Maeda dropped to the bench.

The visitors, with Ryan Strain back from suspension and Caolan Boyd-Munce and Toyosi Olusanya back in the side, stunned the home side with the early opener.

Greg Kiltie’s curling cross from wide on the left was met by Northern Ireland attacker McMenamin and he gave keeper Joe Hart no chance with his header from close range.

The goal concentrated Celtic minds while the fans began grumbling at St Mirren taking the lead.

But they had cause to cheer when Turnbull picked up a Matt O’Riley pass 20 yards from goal and curled a shot high past Buddies keeper Hemming.

There was a handball check by VAR when Turnbull’s shot came off the sliding Buddies midfielder Alex Gogic and when referee John Beaton checked his pitchside monitor he inevitably pointed to the spot.

Turnbull’s spot-kick struck the post, Luis Palma’s effort from the rebound was well-saved by Hemming and then Matt O’Riley headed past the post and Saints breathed again.

Celtic increased the pressure just before the break with Hemming preventing Gogic inadvertently slicing a clearance into his own net before making a good save from Palma’s low drive.

An intricate move early in the second half ended with Hemming making a fine save from Forrest’s drive from 10 yards before the winger and Palma made way for Maeda and South Korean attacker Yang Hyun-jun.

Celtic kept knocking at the door and seven minutes from the end Oh took a pass from fellow substitute Odin Thiago Holm inside the box and drove high into the net.

The hosts should have scored again in added time when Kyogo Furuhashi was clean through, only to be foiled by Hemming.