Witnesses to the horror scene described seeing a woman screaming for help as a “skinny white guy” fled the shop.
One shocked onlooker told the Daily Mail the mum was later seen with her head in her hands screaming: ‘My baby, my baby, what have they done to my baby?’
The child was rushed to hospital with serious burns but has since been discharged. Police said the long-term effect of the toddler’s injuries are not yet known.
A 39-year-old man from Wolverhampton has been arrested on suspicion of conspiracy to commit grievous bodily harm and remains in police custody.