(CNN) A three-year-old boy has been seriously injured in a suspected acid attack in a shop in the English city of Worcester, police said.

The boy was left with serious burns to the face and arms after what police believe was a "deliberate attack" in the Home Bargains store on Saturday afternoon.

A 39-year-old man from the nearby town of Wolverhampton has been arrested on suspicion of conspiracy to commit grievous bodily harm. He remains in police custody, local West Mercia Police said in a statement.

CCTV images of three men police want to speak to about the incident.

Police on Sunday also released CCTV photos of three men they would like to speak to in connection with the incident, adding "they may have information vital to the investigation."

"At this time we are treating this as a deliberate attack on a three-year-old boy," West Mercia Police Chief Superintendent Mark Travis said in a statement.

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