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Dundee 0-5 Rangers - Jack's early goal has Rangers in front; Danilo, Lammers & Dessers net after break & Tavernier adds fifth from spot after VAR review
Kick-off delayed after visitors' late arrival, then players taken off after flare smoke from Rangers end clouds pitch
Celtic 2-1 St Mirren - McMenamin heads visitors into shock lead; Turnbull levels before missing from spot but Oh gives hosts win
Hearts 1-0 Livingston - Vargas with only goal of game
Motherwell 2-4 Aberdeen - McGrath with opener before Devlin doubles lead; second half kicks off late due to issue with referee comms system before McGrath & Duk net; Bair & Biereth pull goals back
St Johnstone 2-1 Kilmarnock - early Clark double for managerless bottom side; Vassell pulls one back before Costelloe sent off
Celtic 2-1 St Mirren
Celtic will be glad to see the back of Zach Hemming after this game.
Kyogo sends Alex Gogic for a hotdog with a delightful drop of the shoulder and must have thought that he'd added a third, but Hemming reacts brilliantly to tip it wide.
We're deep into added time at Celtic Park.
Ryan Jack's early goal - a tap-in after Trevor Carson spilled Danilo's shot - is the difference.
I say early, it's nearly ten o'clock...
We had the 45-minute delay to kick off after Rangers got stuck in traffic, and then the 15 minutes when the players were taken off after flares set off the fire alarm.
Image source, SNSMotherwell 1-4 Aberdeen
Theo Bair has now scored more goals Motherwell than he did for St Johnstone.
Theo Bair
It's not an exaggeration to say that's one of the softest goals I've seen.
Bair lofts a nice floaty shot at goal but somehow Kelle Roos is unsighted, and it bounces lightly into the corner of the net.
Bizarre stuff.
Motherwell 0-4 Aberdeen
Andy Burke
BBC Scotland at Fir Park
You could have forgiven the Aberdeen fans for travelling with a little trepidation to Fir Park this evening given what their team put out at Rugby Park at the weekend, but they are loving what they are seeing from the Dons tonight.
They have travelled in healthy numbers as they tend to do and no doubt many more will make the trip to Hampden at the weekend for the League Cup semi-final against Hibs.
After this display they will fancy their chances.
Dundee 0-1 Rangers
Dundee work some space for Amadou Bakayoko in the box and he forces a save from Jack Butland, but then the flag goes up for offside.
St Johnstone 2-1 Kilmarnock
Fraser Murray on for Danny Armstrong as Killie begin to run out of time.
Duk
That is far, far too easy.
A simple corner is whipped in near the keeper and Duk leaps highest to nod in ahead of Liam Kelly.
This is a really, really worrying performance from Motherwell. They've shown very little fight.
Celtic 2-1 St Mirren
St Mirren could, maybe should, have equalised immediately.
The ball breaks for Greg Kiltie inside the Celtic box, but his goal-bound shot is well blocked.
Big chance.
St Johnstone 2-1 Kilmarnock
Liam Donnelly goes close for Killie with a near-post header, but Dimitar Mitov beats it clear.
Can Kilmarnock find an equaliser?
Motherwell 0-3 Aberdeen
Meanwhile, Connor Barron is on for Dante Polvara and there is ANOTHER Motherwell player into the book.
This time Liam Kelly is the man who sees yellow. I think it's dissent.
There won't be a hat-trick for Jamie McGrath. He's replaced by Duk.
Oh Hyeon-gyu
That's a huge goal for the league leaders.
A touch of real class finally unlocks the St Mirren defence.
Kyogo flicks one round the corner for Odin Thiago Holm, and the Norwegian midfielder slides a lovely pass through for Oh Hyeon-gyu.
The striker takes a touch before hammering his shot into the roof of the net beyond Zach Hemming.
Jamie McGrath
Game over.
Bojan Miovski drives at goal and is tackled on the edge of the area. The ball breaks to McGrath, he is taken out by Liam Kelly but gets back to his feet and finishes.
This is a great response from the Dandies, but a real disappointment from Motherwell.
Kenneth Vargas
A big, big goal for Hearts and Steven Naismith.
Lovely work from Jorge Grant, his searching little pass is met and smashed home by Kenneth Vargas for his first Hearts goal.
Celtic 1-1 St Mirren
There's really not much to report from Celtic Park.
Celtic continue to dominate possession, without really doing anything with it.
Hearts 0-0 Livingston
Beni Baningime, who has been on a yellow card for a wee while, has departed for Calem Nieuwenhof in midfield.
The home fans are starting to get annoyed.
Dundee 0-1 Rangers
Kheredine Idessane
BBC Sport Scotland at Dens Park
Home boss Tony Docherty's night couldn't really be any worse right now.
He's prowling around his technical area in frustration. A 45-minute delay to kick-off due to the Rangers team bus getting caught in traffic.
Then another delay because of the smoke created by the flares the Rangers fans set off.
Then his keeper Trevor Carson literally hands the opposition an early lead. He's demanding better from his side, much better.
Dundee 0-1 Rangers
Brilliant save from Trevor Carson!
Danilo is put through with just the goalkeeper to beat from seven yards, but Carson denies him.
The Dundee keeper is determined to make up for his earlier error.
St Johnstone 2-1 Kilmarnock
The St Johnstone man looks like he's literally in tears.
He thought he'd get away with one after a high, high challenge on Danny Armstrong, but after a look at the monitor, the referee sends him off.
If St Johnstone are going to hang on for all three points, they'll have to do it with 10 men.
Dundee 0-1 Rangers
Now Malachi Boateng has a crack from distance for Dundee, but again it's straight at Rangers keeper Jack Butland.
Better from the home side, though.