A pensioner was attached by a banned breed of dog while he was cycling in Mansfield Woodhouse.
The incident happened at 2pm on Thursday, June 27 in Roman Bank .
Police want to speak to the owner of the dog believed to be a Japanese Tosa, a banned breed in the UK.
The man suffered no injuries but his bike tyre was damaged.
The dog owner is described as white, 5ft 9ins tall, stocky build and in his 50s.
He had light coloured receding hair, and was wearing a blue jumper, shorts and red socks with a local accent.
It's believed he may live in Ranskill, Blyth, Bircotes, Scrooby, Harworth, Mattersey, Everton or Bawtry.
If anyone has any information contact police by ringing 101 quoting incident number 431 of 27 June 2019.
