Armed police were in a shoot out with three men following a car chase in east London.
Three people have been arrested on suspicion of attempted murder after shots were fired towards officers.
Police were called to Lascelles Close in Leytonstone at 10.45pm on Thursday to reports of suspects seen with a gun.
Armed officers attended the scene and, a short time later, a vehicle was seen nearby which failed to stop for officers.
The suspects were arrested in Bective Road, Forest Gate, more than a mile away from where officers were initially called.
Scotland Yard said "a number of shots were fired towards officers" during a pursuit, and police also fired weapons.
There are no reports of injuries. They have been taken to an east London police station where they remain in custody.
A Met Police spokesman said: "Officers and the National Police Air Service remain in the area.
"A crime scene is in place. The Directorate of Professional Standards has been informed as is routine."
