A group of teenagers shouted racial abuse at staff after kicking and damaging a restaurant door.
Four teenagers kicked and damaged a fire exit door of the Mughal Dynasty Indian restaurant in High Street, Raunds.
A police spokesman said: “When staff opened the door to see what was happening, the four offenders hurled racial abuse at them before running off towards Ponds Close which is behind the restaurant.
“The offenders are described as white and in their late teens.
“All were dressed in dark clothing.
“Officers would like to speak to anyone who witnessed the alleged incident, which happened on Sunday, November 27.”
Witnesses or anyone with information about the incident are asked to contact Northamptonshire Police on 101 or call Crimestoppers anonymously on 0800 555111.