Police have released this CCTV image of a foul-mouthed bus passenger, who abused the driver in east London.
The suspect boarded the 372 bus in Bridge Road, Rainham – which was travelling between Hornchurch and Lakeside - at 2.45pm on May 4.
He quickly became abusive and threatened the 38 year-old male driver.
The suspect is described as a white man, slim and aged about 60 years-old with dark grey short hair, round glasses and wearing workman style clothing.
Anyone with information is asked to contact Police Constable Bevely Clapp, from the Roads and Transport Policing Command, on 07825 386 484 or Crimestoppers anonymously on 0800 555 111 quoting ref: 178821.