Police investigating a suspected acid attack on a three-year-old boy in Worcester on Saturday have arrested a fifth man in connection with the on-going investigation.
The man, aged 41, from Wolverhampton has been arrested on suspicion of conspiracy to commit grievous bodily harm.
Detective Inspector Jim Bayliss said: "Our officers are continuing to work extremely hard on this investigation.
At this time we believe this to be an isolated incident and there is not a wider risk to the public."
A 39-year-old man from Wolverhampton and three men, aged 22, 25 and 26, from London have already been arrested on suspicion of conspiracy to commit grievous bodily harm and remain in custody at this time.
Anyone with information that could help police with their enquiries should call 101 quoting incident 442s of 21 July 2018. Alternatively, information can be provided anonymously to the independent charity Crimestoppers on 0800 555 111.