A police officer was hit on the head with a bottle and had her hair pulled during a struggle.
Two officers were dealing with anti-social behaviour and drinking at the Gallows Inn playing fields, off Ilkeston Road, Ilkeston, when they were approached by a youth.
One of the officers was struck to the side of the head with a bottle and had her hair pulled.
The second officer was hit several times and was kicked in the head while assisting his colleague.
Derbyshire police have released an image of a youth they'd like to speak to in connection with the incident.
Anyone with information that may help the investigation is asked to call the force on 101, quoting reference 21*268476.
Police can also be contacted via the force's official website, Facebook and Twitter accounts.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.
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