A man has been released after being arrested on suspicion of criminal damage and attempted grievous bodily harm.
Police were called at about 9.30pm on Saturday to the area of Allonby beach, after reports of criminal damage.
Officers quickly arrested, a 34-year-old man from Sunderland on suspicion of criminal damage and attempted grievous bodily harm
He has since been release pending further enquiries.
A man from Durham, also 34, suffered minor injuries.
The force says it is not looking for anyone else in their investigation.
Anyone with any information is asked to contact police on 101, quoting number 235 of July 6.
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