Bosses at Warner Bros Studios have said safety for visitors is a “primary concern” after staff discovered food laced with dangerous objects.

The Sun reported that a worker found a shard of glass in a half-eaten muffin left by a customer on Wednesday (July 17) at the Harry Potter Studio Tour at Warner Bros Studios in Leavesden.

It said managers launched an immediate investigation, ordering staff to gather all the food for inspection.

This revealed silver metal pins used at the attraction inside 13 muffins.

Warner Bros say the food was discovered before the Studio Tour opened and did not leave the kitchen.

It also said no “contaminated” food was served to visitors and the Studio Tour’s café’s remained open throughout the day.

It added: “We are taking this matter extremely seriously, the safety of our visitors is our primary concern. We are working with the police to investigate the incident.

“No contaminated food left the kitchen and additional safe-guarding measures have been put in place as a precaution.”

Food has since been back on sale after executives deemed it to be safe, according to The Sun.

A spokesperson from Hertfordshire Constabulary said: “We are investigating an incident at Warner Bros. Studios in Leavesden on Wednesday July 17 where foreign objects were reportedly found in a small amount of food.

“The food in question was intercepted before it was made available for consumption.

“Enquiries are continuing, and officers are working closely with the studios who are fully supportive of the investigation.”