Police investigating the disappearance of Newbridge man Kyle Vaughan say they have arrested a 21-year-old local man on suspicion of assisting an offender.
It's the third arrest made so far in the investigation. A 62-year-old man arrested on suspicion of perverting the course has been bailed, while officers continue to question a 27-year-old on suspicion of murder.
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The raids took place in Oakley Way in Caldicot and the Somerton area of Newport on Friday, 20 April.
Passengers being urged to check before they travel as upgrading work begins between Cardiff and the Severn Tunnel.
Over 40,000 people in the UK have young onset dementia. One charity says there needs to be more support for people in Wales under 65.