Wiltshire Police have named a second of three men killed in a crash between a van and a lorry on the M4 on Monday.
The incident happened on the westbound carriageway of the motorway at junction 17 at Chippenham shortly after 4.30am.
Two passengers in the van were pronounced dead at the scene and a third man, who was taken to Southmead Hospital in Bristol, died on Wednesday.
A fourth man remains in a critical condition in hospital.
One of the victims has been named as James Vernon Stark, 37, of Mountain Ash, Rhondda Cynon Taf, in Wales.
Another victim has already been formally identified as Martin Williams, 36, of Trecynon, in Wales, yesterday.
Formal identification of the third victim is likely to be concluded in the next few days.
A fifth male, who was driving the van, was taken to the Great Western Hospital in Swindon with minor injuries but was released the same morning.
A 37-year-old man from Aberdare was subsequently arrested on suspicion of causing death by dangerous driving.
He has been released on police bail pending further enquiries.
The M4 westbound was closed for a total of nine hours while recovery of the vehicles took place.
Anyone who witnessed the collision is asked to contact Wiltshire Police on 101 or Crimestoppers on 0800 555 111 where information can be left anonymously.
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