A man was arrested and a number of others were seen to run from the car.
Road closures have been put in place in the area.
Panic ensured following the incident after three people were
killed and more than 50 injured after terrorist Adrian Ajao hit them
with a car on Wednesday outside Parliament.
A spokesman for the Met said: "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."