Three people are in hospital following a collision on Landor Street in Birmingham.
Police were attempting to stop a Renault Laguna, which was then involved in a collision with an Audi and Ford Fiesta.
The driver of the Renault was arrested for driving and drugs offences.
Landor Street remains cordoned off as investigations continue.
The matter has been referred to the Independent Police Complaints Commission.
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A cloudy and mild day with outbreaks of rain at times, which could be heavier in the morning.
The extension will run through Dudley to the DY5 Enterprise Zone at Brierley Hill and is estimated will create 7,000 jobs.
Outbreaks of rain will remain throughout the morning but it will start to dry up as the day progresses - remaining mild.