Three people were knifed and rushed to hospital within just a few hours in Shepherd’s Bush on Wednesday evening.
He was rushed to hospital, where doctors confirmed his condition was non-life threatening.
Police arrested a man, 22, on suspicion of being in possession of an offensive weapon and he remains in custody, reports MyLondon.
Later the same night, two other men - who are both aged 25 - walked into a west London hospital with stab injuries and, again, both were found to be non-life threatening.
Both men were arrested on suspicion of grievous bodily harm and taken into custody.
A spokesman for the Metropolitan Police said: “Police were called at 10.40pm on Wednesday, September 15 to reports of a man with stab injuries outside Shepherd’s Bush Underground Station.
“Officers attended along with London Ambulance Service. A 30-year-old man was taken to hospital with stab injuries to his arm and chest. His condition was assessed as non-life-threatening.
“At around the same time officers on patrol stopped a 22-year-old man on Uxbridge Road. He was arrested on suspicion of being in possession of an offensive weapon and taken into custody.
“Two men, both aged 25, later self-presented to a west London hospital with stab injuries. Their conditions were assessed as non-life-threatening.
“They were subsequently arrested on suspicion of grievous bodily harm and taken into custody.”
Police enquiries are ongoing to establish the circumstances of the incident.
The Metropolitan Police is asking for anyone with information is asked to call police on 101 or tweet @MetCC quoting CAD 7998/15Sep. To remain anonymous, contact Crimestoppers on 0800 555 111.