A spokeswoman for Asda said: “There was an incident at our store involving a small child and police were called. Thankfully, no-one was injured.”
A police spokesperson said, "We received a report from security at Asda claiming they had spotted youths playing with a weapon outside shops on Breck Road.
"Officers attended the scene immediately, located the youths and established that the guns were toy guns, recently purchased at a local shop.
“Officers confiscated them and gave advice regarding public concerns over firearms. No offence was committed and no other calls were received from members of the public.
"The following day, security contacted Merseyside police again stating they had reviewed the CCTV and had discovered one of the men appeared to place the gun into a young child's mouth.
"This CCTV is in police possession and has been processed. At this time no offence has been committed.”