The action resumes in Perth.

Ross Laidlaw is finally forced into a save, and it's a good one.

Ryan Alebiosu cuts in from the right and crosses, Oli Shaw powers a header at goal and Laidlaw throws himself to his left to save. Killie having the better of it so far in this half.

Kevin van Veen cuts inside and sends in a shot towards the near post which takes a deflection wide.

Worryingly for Livingston, Jack Fitzwater appears to have injured himself trying to halt Van Veen and he's been down receiving treatment for some time.

Kenny Crawford
BBC Sport Scotland at McDiarmid Park

We’ve had a disallowed goal for Aberdeen in this delayed opening 45 but it’s hardly been a first half awash with chances.

For the Dons, Jaydon Richardson is like an express train down the right-hand side and in the couple of real moments when he’s attacked with intent there’s a sense of expectation from the sizeable away support, who Aberdeen will be shooting towards in the second half.

St Johnstone have given Kelle Roos a few things to think about and Jim Goodwin will be wary of the deliveries coming in from Graham Carey. Callum Davidson’s men will need to be careful in the second half, with three players on bookings.

Image source, SNS

Turns out Kyle Lafferty was taken off at half-time. It suggests how exciting this game has been that we've only just noticed.

Innes Cameron is on in his place for Killie.

Best chance so far from Kilmarnock.

Ross Callachan heads away a cross, Alan Power chests down and slices a volley at goal - but it's just over Laidlaw's bar. Not a bad effort at all.

As they trot off for the interval in Perth, the other games are re-starting.

One goal so far in the three o'clock top flight games... Let's hope they catch fire in the second half like the early kick off at Easter Road.

Image source, SNS

As has been the case often between these two teams recently, it's not a classic.

Aberdeen striker Bojan Miovski headed the ball into the net, only for the goal to be ruled out for offside.

It's a decision which will be closely pored over on Sportscene later as it was very tight.

St Johnstone were poor early on but have finished the half as the better team. All to play for.

Image source, SNS

Aberdeen goalkeeper Kelle Roos is forced to fling himself down to his right and push over Graham Carey's free kick from out on the right-hand side.

St Johnstone have been much better in the second quarter of this game.

• Annan Athletic 1-0 Stirling Albion
• Bonnyrigg Rose 0-1 Albion Rovers
• East Fife 0-0 Forfar Athletic
• Elgin City 2-1 Stranraer
• Stenhousemuir 0-1 Dumbarton

• Airdrieonians 1-0 Alloa Athletic
• FC Edinburgh 0-1 Falkirk
• Kelty Hearts 0-0 Dunfermline
• Montrose 1-0 Clyde
• Peterhead 1-2 Queen of the South

• Arbroath 0-1 Queen's Park
• Cove Rangers 0-0 Ayr United
• Hamilton 0-1 Raith Rovers
• Morton 0-0 Dundee

A lovely sunny afternoon in Dingwall, but not so bright on the pitch.

Ross County have had the slightly better of it but they are yet to really test Sam Walker.

Kilmarnock's attack force have practically been missing in action. Oli Shaw has had one shot straight at Ross Laidlaw and all Kyle Lafferty has done is put in two very rough challenges.

Bad-tempered at times. Hopefully better to come in the second-half.

Image source, SNS

St Mirren are in front thanks to Curtis Main.

A Mark O'Hara pass fortuitously deflected into his path and he finished it off calmly.

Jonah Ayunga and Keanu Baccus went close for the visitors, who bossed the first 25 minutes, with Glenn Middleton's dipping free-kick testing Trevor Carson at the other end.

Image source, SNS

Last week both of these sides impressed in victories over Aberdeen and Hibernian respectively.

This week, though, they have both yet to get anywhere near those levels.

Nicky Devlin had a shot saved early on for Livingston, while Ricki Lamie was unlucky not to hit the target with a diving header at the other end.

Other than that, there has not been much to shout about.

Image source, SNS

Kenny Crawford
BBC Sport Scotland at McDiarmid Park

Summer signing from Watford, Daniel Phillips, is a good physical presence in the heart of the Saints’ midfield, but one who offers some nifty footwork and a goal threat. He’s got three caps for Trinidad & Tobago.

Image source, SNS

St Johnstone have a concerted spell of pressure. A corner is flung in, then another cross which is headed away by Anthony Stewart.

The ball falls to midfielder Daniel Phillips who drives a low shot towards the far corner, which Aberdeen keeper Kelle Roos holds.

A minute later and Jamie Murphy cuts the ball back to Theo Bair, who has a wild swipe and the chance is gone.

And now Kyle Lafferty is in the book, too.

He's gone absolutely flying into the back of Jack Baldwin in an aerial battle, leaving the Ross County centre-back crumpled in a heap. Then he's gone face-to-face with an unhappy David Cancola. A few fireworks at the end of the first-half.