A 12-year-old girl was allegedly sexually assaulted in broad daylight by a group of men on the top deck of a bus in Birmingham.

The schoolgirl was travelling to the city centre with three friends on Saturday afternoon when around six men approached her on the top deck of the bus, police said.

The bus was in Finchley Road, Kingstanding, when the girl was attacked by a group of men “in their early 20s."

Police confirmed they are investigating reports of a sexual assault on a No.33 bus at around 3pm on March 16.

The girl’s mother has since issued an appeal for information, telling Birmingham Live her daughter is shaken by the incident and that she feels “useless I wasn’t there when she needed me most”.

She said: “No words can describe how I felt when she phoned me. She was really shaken up, there were about six of them.

“The top of the bus was empty but they went and approached my daughter and her mates. My daughter's friends were assaulted and they ran downstairs and off the bus. My daughter was left upstairs with them.”

The men left the bus in the city centre, the victim’s mum added.

She said the incident has been reported over the phone to police, who are “yet to come out to see us”.

A spokesman for West Midlands Police said: “Police are investigating reports a 12-year-old girl was sexually assaulted on a bus in Finchley Road, Kingstanding, just before 3pm on March 16.”

Enquiries are ongoing and anyone with information is asked to call police on 101.