The two girls sat downstairs after boarding the number 57 at the Silverburn depot. The victim then went to the upper deck where she got into a conversation with the two men.
She was assaulted and raped by both of them. Her friend, also 14, went upstairs to check on her and raised the alarm with passengers downstairs.
A woman and two men came to the girls’ aid, before they all left the bus two stops along from Silverburn. The passengers are said to have waited with them until they got another bus home where police were contacted.
No CCTV footage is available from the bus and Strathclyde Police yesterday appealed for passengers to come forward to help their investigation. Both of the attackers are said to be aged around 18 to 20, and stayed on the bus for nearly two hours.
One is about 5ft 10in with a shaved head and was wearing a black jumper. The other had brown, spiky hair and was wearing a tracksuit which may have been grey, with a body-warmer or jacket.
Detective Constable Jackie Carroll of Greater Glasgow CID said: “This was a very frightening experience for the young girl concerned and, thankfully, she was assisted by her friend and the good samaritans on the bus who ensured she got home safely.
“She has been left traumatised by her ordeal.
“We’re continuing extensive inquiries into the incident and would like to trace two men and a woman who came to her assistance as they will have vital information which could help with our investigation.
“We know that the men responsible boarded the bus in the city centre. The men were very loud and using crude and lewd comments to other passengers.
“The bus driver ejected the two men from the bus at Pollokshaws Road, near Queen’s Park, around 12:30am. I would like to speak to anyone who may have been present on the bus at the time of the attack, as it is imperative we trace these men.”
Anyone with information is asked to call Greater Glasgow CID on 101 or Crimestoppers anonymously on 0800 555 111.