The supplier behind charms believed to contain high levels of cancer-causing chemicals has said they immediately suspended sales after the discovery.
Manchester-based RMS International, which provided the charms to The Entertainer, said it had also started re-testing all other relevant products.
A spokesman said:
They added that the problem only involved some of the PVC loom charms, not the loom bands, and advised any customers with concerns to return their product to where they bought it from.
One of the UK's leading toy stores has taken loom band charms off its shelves after they were found to contain potentially harmful chemicals which have been linked to cancer.
The Entertainer said the charms could contain phthalates- used to soften plastics- which can also disrupt hormones in children and cause birth defects.
A spokeswoman for company said: "It was brought to our attention today that loom charms purchased from one of our stores may contain phthalates.
"At The Entertainer, children's safety is our number one priority so as a precautionary measure we have removed all loom charms from sale with immediate effect whilst we conduct a full investigation."
She added any customers who have bought the charms will be offered a full refund or exchange.
The spokesman added it was only the charms that were affected and not the loom bands themselves, which have been spotted on the Duchess of Cambridge and One Direction's Harry Styles.