Police are appealing for two woman seen on CCTV to help them with their inquiries into a missing pensioner from Abertridwr.
Officers believe the pair might have seen Trevor Elias the night he went missing.
They were seen walking ahead of him on Commercial Street toward Senghenydd Square.
77-year-old Elias went missing during the early hours of Friday 6th April.
Trevor is described as being approximately six feet tall, of very thin build, and has brown short hair. He wears glasses.
If anyone has any information about his whereabouts that night or since, call Gwent Police on 101.