Two children and two adults were taken to hospital after a crash in Lowestoft earlier this month.
Police were called to reports of a two-vehicle crash in Hollingsworth Road at around 4pm on February 9.
Several ambulances attended with one person suffering a broken arm and the rest were left with more minor injuries.
All four patients were taken to the James Paget Hospital in Gorleston for further treatment.
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A spokesman for Suffolk Police has confirmed one of the drivers - a woman - was been interviewed after she was suspected to have been drink driving.
He said the investigation is ongoing.
Police are now appealing for any witnesses or anyone with relevant dashcam footage to come forward.
Anyone who may be able to help should contact PC 5006 McAlister at Lowestoft Police Station, by emailing ryan.mcalister@suffolk.police.uk or calling 101 and quoting crime reference 37/7640/24.
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