A THUG fractured a man’s jaw amid claims he hit his sister with a hammer.

William Gibson, 60, pounced on Alan Monaghan, 54, at The Black Bull pub in Glasgow city centre's High Street on August 10 2019.

Gibson struck Mr Monaghan through a set of doors and punched him on the back of the head.

He later remarked: “I had to get him, he hit my sister with a hammer and got away with it.”

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Gibson pleaded guilty yesterday (wed) at Glasgow Sheriff Court to the assault to Mr Monaghan’s severe injury.

The court heard Mr Monaghan was in the pub by himself drinking a can of cola before leaving at midnight.

Gibson followed him and approached him from behind.

Prosecutor John Bedford said: “Mr Monaghan felt a strike on the back of his head, fell between two doors and felt a punch.”

Gibson said: “You b****** that’s for my Lizzie.”

He was hauled away from the bleeding Mr Monaghan by a woman before making the hammer comment.

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Mr Monaghan suffered an acute jaw fracture, multiple nasal bone fractures and two broken teeth.

He told police officers that he had been in a relationship with Gibson's sister but it ended.

Gibson, of the city's Germiston, was later traced and arrested.

Sentence was deferred until next month for background reports by Sheriff Paul Crozier who continued Gibson’s bail meantime.