Police in Derry are appealing for information following the report of an assault at a house in Gogarty Close last night.
At around 11.20pm, two male youths wearing Puffa jackets with their faces concealed, entered the premises.
They assaulted a teenage male youth who was left with injuries to his head and face.
The two males then made off on foot across nearby waste ground.
Police are appealing for anyone with any information about this incident to contact officers in Strand Road on 101 or Crimestoppers anonymously on 0800 555 111.