Crowd trouble is understood to have flared at Build-A-Bear workshops across the UK, including in Belfast, due to demand during a pay-your-age promotion.
Families have endured lengthy queues in order to try to secure bargains for their children on Thursday.
The company has since closed a number of stores and halted the offer.
Police have been called to a number of locations, including the branch at Victoria Square in Belfast city centre.
There had been reports of a pregnant member of staff being punched, but police say they attended “to maintain order”.
A PSNI spokesperson said: “No offences have been detected at this time.”
In a statement on the company website, Build-A-Bear said: “Based on the unprecedented response to our Pay Your Age Day event in our early opening stores, we are experiencing significantly longer than expected lines and large crowds.
“Local authorities are requiring us to limit the lines and crowds due to safety concerns.
“We understand this is disappointing, we are working to address the situation, and we will be reaching out to our valued guests soon.”