A RAIL passenger on board a train in Marston Green allegedly spat at another commuter, twisted his arm and pushed his face against the window following an argument over seating.
British Transport Police (BTP) have released a CCTV image of a man they want to question in relation to the brutal assault.
The train was travelling between Birmingham and Marston Green train stations, on Thursday, May 24, with the incident happening at 9.30pm.
Investigating officer, PC Dawn Dominguez, said: “Enquiries have been ongoing but all efforts so far to trace the man have proved fruitless.”
Anyone with information should contact British Transport Police on 0800 40 50 40 or Crimestoppers on 0800 555 111.