Warning: Some may find the images in this article distressing.
A pensioner was left with a pen embedded in her arm after a row on a coach in Blackpool.
Cynthia Bell, 66, from Durham, was helping at her husband's coach company when a man boarded the vehicle and refused to leave.
The man stabbed Ms Bell with a pen as she attempted to stop him touching the controls.
The incident occurred in a coach park at Seasiders Way in Blackpool at around 5pm on August 24.
Lancashire Police said the 66-year-old was lucky to avoid serious blood loss or nerve damage.
The offender - who used "significant force" to stab Bell - is described as a white male in his late teens or early 20s, 6ft and of stocky build, with short dark hair.
Police are also attempting to trace two young women who were with the suspect.
The first is said to be white, wearing a pink top with a floral print and walked with a limp and pushed a pram.
The second woman had blonde hair, a tattoo on the right side of her lower stomach and was wearing a cream jumper.
Anyone with information has been urged to contact either PC 6857 Danny Morris or DS 3370 Mark Dickinson on 101 quoting log number 0979 of 24 August 2014.