Three men attempted to steal mobile phones from a man and woman as they walked past Bankfields Primary School, Bankfields, Eston, shortly after midnight on Sunday.
The male victim was left with facial injuries and one mobile phone was smashed. The three men are described as white, all 5ft 6ins to 5ft 7ins, with hoodies.
Two had dark tops while the other had a white one.
Witnesses are asked to contact DC Ian Cox, at Kirkleatham Police Station, on 01642-302626 or Crimestoppers on 0800-555i11.
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