Police say new CCTV footage shows missing Haverfordwest man Ben Thompson in the Leckwith area of Cardiff on Saturday night, shortly after he was last seen by a colleague in the city centre.
The footage is from 7.17pm, the latest he has been pictured.
He appears to have come from the direction of the Jubilee Recreation Ground.
Officers say they are "now particularly keen to hear from anyone who has seen Ben since 7.17pm on Saturday."
Anyone with information is asked to call Cardiff Bay Police Station on 02920 338 465.
More top news
Women speak to ITV Wales about the chronic pain they are suffering after having surgical mesh as fresh calls are made for it to be banned
Welsh drivers have incurred nearly half a million penalty points from speeding, new analysis has found.
A windy day with a mixture of blustery showers and some sunny spells.