A 33-year-old man suffered life-threatening injuries when he was shot with a crossbow in the street.
The victim was found in Pield Heath Road, Uxbridge, west London, on Monday evening. He was taken to a hospital in west London and his injuries are considered life-threatening, the Metropolitan Police said.
Cordons were put in place around the scene and no arrests have yet been made.
Anyone with information can call police on on 101 quoting CAD 7227/14Sep, or to remain anonymous contact Crimestoppers on 0800 555111 or online.