A police cordon is in place after a man was assaulted inside a house in Rayleigh.
Police officers and forensics are currently on scene.
A spokesman for Essex Police said: "We were called shortly before 3.50pm on Tuesday, October 2 with reports a man had been assaulted at an address in Down Hall Road, Rayleigh.
"We attended and found a man with a cut to his leg, which was not believed to be life threatening.
"A 19-year-old man from Crawley was arrested on suspicion of causing grievous bodily harm and is currently in custody for questioning."
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