Police are appealing for help to trace three men after a window was ripped from its frame on a Metro train.
The incident happened at approximately 8.50pm on Tuesday, June 6.
Three men got on the Metro at Chichester and left at South Shields station.
They became involved in an altercation during the journey and dislodged a window from the frame causing damage to the glass.
Police want to speak to the men. They are described as all white men, aged late teens to early 20s:
One had short dark hair shaved at the sides, he was wearing a blue zip up jacket and white t-shirt, black shorts,
Second; a grey hoody with the hood up and a red t-shirt with white lettering, black jeans
Third: had short brown hair with a blue zipped up jacket.
Anyone who recognises the men, or who has any information about the incident, should contact police on 101, extension 69191, quoting reference number 35527S/15 or ring the independent charity Crimestoppers on 0800 555 111.