A bigoted lorry driver launched an unprovoked sectarian attack on a Celtic fan in a kebab shop.

Craig Donald assaulted student Michael Lafferty after watching Scotland play Spain in a Euro 2012 qualifier.

Donald, who was previously cleared of racially abusing ex-Celtic player Momo Sylla, was drunk after attending a funeral before the match.

The 37-year-old asked which football teams each of the kebab shop customers supported.

When Mr Lafferty, 19, said he was a Celtic fan, Donald called him a "tattie picker", branded him a “Fenian" and said he would "put a bullet in his head." He then punched the teenager on the face and left the shop to get in a taxi. When he was arrested Donald admitted carrying out the sectarian attack.

On Friday at Perth Sheriff Court, Donald, a St Johnstone fan who was once convicted of streaking at McDiarmid Park, admitted carrying out an assault aggravated by religious prejudice.

He also admitted breaching the peace in a religiously prejudiced manner at Perth Kebab House on October 11 last year by shouting, swearing and making sectarian remarks.

Fiscal depute Nicola Manison said the 37-year-old, from Tulloch Terrace, Perth, had entered the kebab shop shortly after the end of Scotland's 3-1 defeat to Spain.

She added: "There had been a football match on and the accused had been watching it in premises nearby. Following the match, at 10pm, he was in the kebab house. He started conversation with several customers, discussing which football teams they supported. The accused was very agitated and appeared to be under the influence of alcohol.

"The accused asked Mr Lafferty, who was not known to him, which team he supported and he replied Celtic. The accused called him a Fenian and said he would put a bullet in his head. The accused then lunged forward and punched the complainer on the face." Solicitor Paul Ralph, defending, said: "The exact amount he drank is unquantifiable. He was at a funeral that day which is part of the reason for his intoxication."

Sheriff Robert McCreadie told the Perth and Kinross Council worker: "You are a man who becomes aggressive and violent under the influence of alcohol. It is unpleasant and unacceptable in today's society. The threat to put a bullet in someone's head is a threat which has to be taken seriously. It's a shocking thing to say.

"A custodial disposal is now on the cards. You cannot go on behaving like this in a civilised society and keep expecting to get away with it. To say such things to people is disgraceful. You have reached the custodial threshold."