Police were called to a disturbance in Claxton Grove around 11.20pm yesterday (June 11).
Officers arrived to find paramedics treating two men for gunshot wounds.
Both were taken to hospital where it was confirmed that a 30-year-old man has “life-threatening injuries”.
The second man, also in his 30s, sustained minor injuries.
A 28-year-old man was arrested on suspicion of attempted murder and remains in police custody.
Claxton Grove remains closed by a crime scene as an investigation continues.
It is understood that this was an isolated incident and police are appealing to any witnesses to come forward.
A Metropolitan Police spokesperson said: “A 28-year-old man remains in police custody after he was arrested on suspicion of attempted murder following a shooting in Hammersmith.
“Police were called to a disturbance in Claxton Grove, W6 at 23:19hrs on Wednesday, 11 June.
“Upon arrival, the London Ambulance Service were treating two men for gunshot wounds.
“Both were taken to hospital where it was confirmed that a 30-year-old man has life-threatening injuries.
“The second victim, also in his 30s, was treated for minor injuries.
“If anyone witnessed the incident, or has any information that can help us, please contact the police as a matter of urgency on 101 quoting 8916/11JUN.
“To remain anonymous, call Crimestoppers at 0800 555 111.
“Claxton Grove will remain closed while a crime scene is in place.”
The London Ambulance Service has been contacted for further details.
