The device used in an assault on three boys in the Glen Road area of west Belfast on Wednesday September 6 was an electronic lighter.
Detectives investigating the incident have conducted an interview with a 16-year-old male youth.
He attended Musgrave police station voluntarily for the interview.
Detectives are now completing a report which will be forwarded to the PPS.
Detective Inspector Paul Roland has appealed for anyone with information to contact Musgrave station on 101 quoting reference 811 of 6/9/17.