A car has hit a number of pedestrians in Islington, north London, leaving four people injured.
The collision took place on Essex Road near the Queen's Head pub on Saturday night at around 10.55pm.
Four males aged between 17 and 19 have been arrested on suspicion of a variety of offences including GBH with intent and possession of points and blades and all remain in custody.
Two knives were recovered from the scene, one inside the car, the other close to it.
Police said the incident "is not being treated as terrorist related".
Some roads in the area have been closed.
The Metropolitan Police said in a statement: "Police were called at approximately 22:55hrs on Saturday, 25 March to reports of a car in collision with a number of people in Essex Road, N1.
"Officers and London Ambulance Service attended the scene; initial reports state four people are suffering injuries - their condition awaits.
"The occupants decamped from the car and fled the scene on foot. One male has been arrested; enquiries continue.
"While enquiries into the circumstances continue, this is not being treated as terrorist related. Officers from Islington investigate."