Detectives are appealing for witnesess after a substance believed to petrol was thrown at a group of people outside a Northampton nightclub.
Police say the incident happened at around 6am on July 2 in Horseshoe Street after a row between a man and the occupants of a white Vauxhall Astra.
Three men from Milton Keynes, aged between 19 and 29, were arrested in connection with the incident and later released on police bail pending further enquiries.
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A Northamptonshire Police spokesman said: “Between 6am and 6.45am, an altercation took place at the corner of Horseshoe Street between the occupants of a white Astra had another male.
“One of the vehicle’s occupants discharged a noxious substance from a bottle, believed to be petrol, towards a group of people before the car drove off.”
Witnesses or anyone with information can call 101 using incident number incident number 22000379166 or contact CrimeStoppers anonymously on 0800 555 111.