Danny Swanson, who had replaced Douglas, swept a diagonal delivery into the box and Russell leapt highest to loop a header over Kello and into the net.
Eventually a harried housewife or a busy executive will be able to order a ready-to-eat or ready-to-cook gourmet meal for delivery by dinner time (see box).
Ten years ago it started out as a drop box service - where delivery companies could leave customers' products that had been ordered from online retailers.
Investigators also found a pizza box and a pizza delivery uniform jacket that they believe links Ebel to the death of Leon, who worked as pizza delivery driver.
Filipe Morais's delivery caused chaos in the St Mirren six-yard box and Steven Anderson's initial effort was deflected onto the post before Kenny Deuchar hooked the ball back towards goal.
But Leadbitter's side-footed effort back into the box was cleared by Richard Dunne and Jones could only get a toe to another delivery to the back post.