91Èȱ¬

St Mirren captain Steven Thompson says he is "mortified" after injuring team-mate John McGinn with a spiked pole in a training ground prank.

Thompson threw the pole at McGinn which pierced his thigh and resulted in the 20-year-old missing Saturday's win over Kilmarnock in the Scottish Premiership.

The Scotland Under-21 midfielder is expected to be out for a further three weeks with the injury.

"I'm mortified by the whole thing," said Thompson. "It was a daft prank."

Speaking to the 36-year-old added: "I threw it for a laugh, stupid me trying to be funny, and unfortunately it's anything but. It's a total disaster."

St Mirren refused to comment when contacted by the 91Èȱ¬ and said they would be dealing with the matter internally.

The incident took place last Thursday at the Ralston Training Complex after McGinn robbed Thompson of possession during a dribbling routine.

Thompson said the pole went a centimetre into McGinn's leg and has torn the muscle, but not caused any long-term damage.

The striker added: "I've been shocked by it, to be honest, really down about it. I like a laugh and a joke in training, but for something like this to happen is just unbelievable."