It's believed work is being carried out at the former home of Christopher Halliwell.
Missing: 16 Year Old Has Links To Swindon And Yeovil
Police have launched an appeal to find a missing 16-year-old boy.
Andrew Amoah was last seen near his home in Blackwood, Caerphilly county, on December 10.
He is described as black, approximately 5ft 10in and of slim build, with brown eyes and short black afro-style hair.
A Gwent Police spokesman said:
'Andrew was last known to be wearing blue jeans, a blue puffer jacket and black Nike trainers.
'We know he has links to areas in Woolwich, Yeovil, Swindon and Cardiff.'
Anyone with information relating to Andrew's whereabouts is asked to call police via the 101 telephone number quoting log 422 10/12/13.
After Gromit and Shaun, who will feature in the next arts trail coming in 2018?
The Independent Inquiry into Child Sexual Abuse will host the first Truth Project sessions in the South West
Council confirms plans to sell bus operation to a national firm.
Recently Played Tracks
Now playing: Non-stop hit music
Deposit £10 to get a £40 Welcome Bonus - That's £50 to play bingo, slots and more!*
Over 50 tracks to make you feel-good. New album out now...
Find your local four day weather report here.
What's happening on the roads where you are?
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Find out more about some of the companies advertising on Heart.
Get some great ideas on how to advertise your business on radio, online and on mobile.