Twin 14-year-old brothers and a friend brutally attacked two teenagers on a bus.

The pair were annoyed at the victims - aged 13 and 14 - because they had apparently made a remark about their mother.

They traced the two boys using Snapchat before pouncing on them on a number 5 First Bus in Glasgow's Gorbals on October 4 2020.

The teenagers were stabbed, punched, kicked and stamped upon during the attack, which appeared to be filmed on a mobile phone.

The brothers and their accomplice - who was 16 at the time - had faced attempted murder charges.

But, they instead pleaded guilty at the High Court in Glasgow to assaulting the boys to their severe injury and permanent disfigurement with one also to the danger of his life.

The trio will be sentenced later this month.

The identity of any of the boys can not be revealed due to their ages.

Prosecutor Leanne Cross told how the victims had lunch in the city centre before getting the bus home.

The three attackers were among a group who then got on in the Gorbals area without paying.

They headed to the top of the bus where the boys were sitting.

One of the twins then brandished a knife and lunged at the pair.

Miss Cross said: "He began to attack both followed almost immediately by the other boys in the group.

"They commenced a vicious and concerted assault on the boys, who were completely outnumbered and trapped within the back seats of the bus.

"Some of the group had to climb over seats to reach them."

During the attack, the twin with the blade struck each of the victims.

Miss Cross said: "A couple were seated near the front window with their young son.

"They were horrified and shouted at the group to stop. They paid no attention and continued.

"The woman ran downstairs as her son was distressed. She noticed one of the group had his mobile phone out appearing to record events."

As the driver halted the bus, the attackers raced off, clocked "laughing" as they did so.

One of the victims needed surgery having suffered two stab wounds including one to his chest.

His friend had three knife injuries and also needed hospital treatment.

They have been left permanently scarred.

The three young thugs were traced two days later.

One of the twins claimed the attack occurred because the boys had made a comment about their mother.

Miss Cross said: "As a result of that, they had used Snapchat Maps to find out where the boys were and waited for them."

His brother who had the weapon told police: "Ah well, the knife is in the Clyde."

Sentencing was adjourned for reports.