South Wales Fire Service says the site of a serious fire on the Glyndwr Industrial Estate in Aberbeeg on Tuesday is now safe enough for investigations to begin.
The site is still smoking, and locals are still being warned to keep doors and windows shut and minimise the time they spend outside.
Meanwhile, Environment Agency Wales officers confirm that there has been no environmental impact on the River Ebbw, and the excess water from tackling the blaze is safely contained on the site.
More top news
Were you fooled? We've compiled a round-up of our favourite April Fools jokes from across Wales.
The latest poll focussed attention on how people intend to vote for Westminster but it also asked about next year's Assembly election.
A woman whose father is accused of murdering her baby has told a jury she never hurt the child