An off-duty police officer was injured after a suspected thief reportedly headbutted him.

The man was detained following a struggle in the incident in Swanley.

It is alleged the suspect stole eight cans of beer and was challenged by staff and the off-duty officer who produced his warrant card in the Co-op in the High Street on Tuesday at 8.30pm.

The suspect fled on foot but after being chased by the officer assisted by a member of the public he was restrained nearby.

Police say the officer was hurt and suffered a head injury when he was allegedly headbutted during a struggle.

The man, aged 36, from Swanley was taken into custody on suspicion of theft, assault on an emergency worker and public order offences.

He has been released under investigation.