Karamoko Dembele has been lively for Celtic since coming on and his drilled effort is steered over the top by defender Stephen Welsh.

Ian Harkes goes close to getting Dundee United on the scoresheet, but his curling effort after a nice move is pushed away by Colin Doyle.

St Mirren are still the side in the ascendancy here as Kyle McAllister cracks the post with a rasping strike.

Shortly after, Cammy MacPherson curls an effort wide from the edge of the box.

The 90 minutes are nearly up and Celtic appear to have run out of ideas.

Aberdeen are sitting deep, as they have done for most of the second half, and working so hard to close down any gaps.

Jonny Hayes is through on goal as he wins the ball from Greg Taylor midway his own half and charges towards the Celtic goal.

However, the wing-back runs out of steam as he reaches the Celtic penalty box and collapses in a heap under a challenge from the backtracking Callum McGregor.

Aberdeen's shouts for a penalty go unheeded by referee Willie Collum.

Nearly game over for Ross County.

A sweeping break from St Mirren sees Ilkay Durmus play in Kyle McAllister who squares it for Cammy MacPherson.

The young midfielder can't keep his effort on target but not by much as he hits the side netting.

So close to a second for Aberdeen as former Celtic wing-back Jonny Hayes' low cross on the break is cleared off the toe of Nir Bitton, with the visiting defender fortunate to avoid an own goal as it squirms wide of the far post.

Will the Dons regret these missed chances?

With Kilmarnock 3-0 up at half-time and United not exactly desperate for points, this game has not been as compelling in the second-half.

Deniz is struggling with an injury, so veteran Neil Alexander is warming up on the touchline for Dundee United. He's not needed yet, though...

David Turnbull flashes a shot across the face of Aberdeen's goal for Celtic as they continue to press, having replaced off-form Odsonne Edouard with Scotland striker Leigh Griffiths.

End-to-end stuff in Dingwall now.

This time Billy McKay crosses in to Jordan White who should do better as he touches the ball over the bar.

John Hughes doesn't seem to be settling for a point here with a triple substitution.

Harry Paton, Regan Charles-Cook and Jermaine Hylton all coming on for Billy McKay, Iain Vigurs and Michael Gardyne

A big chance for Aberdeen to extend their lead.

Scott Brown's intervention - Aberdeen will hope he sets up similar chances in the Dons' red next season - inadvertently falls for Lewis Ferguson, but the midfielder is unable to add to his first-half goal and sends his prodded effort off the outside of a post.

St Mirren almost complete the turnaround as Jamie McGrath's corner drops into the six yard box and Conor McCarthy swings his foot at it.

His shot is straight at Ross Laidlaw who just manages to close his legs to stop the ball and keep things level.

Celtic have started the second half with plenty of purpose and Odsonne Edouard heads into the path of David Turnbull.

The midfielder seems certain to score, but one-on-one with goalkeeper Gary Woods, he prods his shot against the face of the crossbar.

That's all she wrote. What a crazy end in Perth!

Rangers remain unbeaten, with three league matches remaining.

A good boost for St Johnstone before the teams meet again at the weekend on Scottish Cup duty.

Image source, SNS

This time, it is definitely a St Johnstone penalty! Deep into stoppage-time.

How are Accies fans feeling right now?

Kilmarnock are home and hosed, surely, and Ross County are in front.

If it stays that way, Brian Rice's team will be five points adrift.

They do, however, have to play both of their rivals before the season is over.