Two people have been arrested in connection with a disturbance outside the Sugar Hut nightclub in High Street, Brentwood, on Sunday, April 2.
A 32-year-old man, from West Drayton, Hillingdon, was arrested on suspicion of attempted murder and a 26-year-old woman, from Hornchurch, has been arrested on suspicion of assisting an offender.
Both are currently in custody for questioning.
The arrests are in relation to an incident in which three people were struck by blue Audi following a fight involving more than 20 people at around 3.10am.
A man is described as being in a critical condition in hospital. The other victims – a man and woman – have since been discharged from hospital.
Anyone with information is asked to contact Brentwood Major Investigations Team on 101 or Crimestoppers anonymous on 0800 555 111. Alternatively you can email www.crimestoppers-uk.org.