By Adam Evans
Detectives say it's "really important" to find whoever dumped hazardous materials at a bonfire site on Belfast's Glenwood Street.
A young boy is still recovering in hospital after coming into contact with the chemical.
Detective Inspector Richard Thornton said: "It's really important that we find the person or people who dumped this dangerous waste at a place where young children were playing.
"We need more information from the public to help with our investigation and so we are asking anyone who saw anything suspicious in the Glenwood Street area between Thursday 18th and Monday 22nd May to get in touch with detectives at Musgrave on the non-emergency police number 101.
"Or, if someone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111."
Murder investigation launched following death of man in Coleraine
Man arrested over threats to elected representatives
Teachers’ unions welcome pay increase while pledging to tackle workload
Minister to explore if he can enforce use of Ulster Banner at Commonwealth Games