A woman escaped with minor injuries in a suspected hit and run crash in Newbury Park.
Two cars collided in Horns Road near the junction with Buntingbridge Road shortly before 1am.
Firefighters said police were treating the incident as a hit and run.
One ambulance was called and checked the 23-year-old woman over but she did not need hospital treatment.
A Redbridge Police spokesman said a 21-year-old man was arrested at the scene after being tracked down by dog units and taken to an east London police station.
Enquires continue.
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