A man suffered burns after being attacked with a corrosive substance in Clifton in what police described as a ‘particularly nasty’ assault.
Officers say the 67-year-old was pushed to the floor by at least one man as he walked along Community Way at about 9pm on Saturday night.
His left shoe came off and the substance was thrown over his foot, causing burns. He was taken to Queen’s Medical Centre for treatment and has since been discharged.
The man did not get a good look at his attackers.
It is thought there could have been up to four men involved who ran off after the incident.
Det Sgt Kate Savage said: “This is a particularly nasty incident in which an innocent, vulnerable man has been targeted for no reason.
“If you saw anything or you have heard someone talking as if they have knowledge of the attack please contact us.”
The attack comes as figures show a significant rise in attacks involving acid and other corrosive substances across the UK.
There were just over 500 in the 12 months to the end of March 2017, more than double the number recorded three years previously.
Anyone who can help is asked to contact Notts police on 101 or alternatively call Crimestoppers anonymously on 0800 555 111.