Celtic chairman Peter Lawwell told a supporter to "calm down" as he faced fan frustration ahead of the Scottish Premiership tie against St Mirren.

The Parkhead supremo was in Paisley to watch the 3-0 win at the SMiSA Stadium on Sunday.

However, before he could enter the ground he faced a fan confrontation as transfer frustrations boiled over into a verbal exchange.

Celtic midfielder Matt O'Riley is completing a medical ahead of a record-breaking move to Premier League club Brighton with less than a week left in the transfer window.

Supporters are understandably anxious over recruiting replacements before the summer window slams shut with Brendan Rodgers keen to bolster his options.

And one supporter told Lawwell to "get the f****** money spent" in an angry exchange outside the St Mirren stadium.

A short clip of the confrontation has been shared online with Lawwell initially telling the supporter to "calm down" adding "don't be daft" shortly before heading toward the main entrance of the ground.

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Another supporter stated "The last three windows have been abysmal" in the back-and-forth ahead of kick-off in Paisley.

Rodgers said of the work to do in the final week of the window: "Yes, it's a lot of work. A lot of work. These are great weeks. Of course, it's building into the game next weekend. That's the big focus for us. But, of course, we want to strengthen the squad and we will look to do that.

"I just hope we can at least get some of it [the Matt O'Riley fee for transfers]."

Quizzed on why recruitment has been a drawn out process, the manager added: "There are a number of things I won't go into here. But it's definitely something - having come back in and gone through three windows now - we have to put right as a football club.

"We shouldn't have been getting into this last week in the position we're in. That's the reality. However, that's something for us after this window.

"As I said, we'll get the players in that we want. We don't need to manufacture our own stress when there's no need. We don't need to do that. So we'll be calm this week. We'll look to get the players in that can strengthen us."