The office of British Prime Minister David Cameron said on Wednesday that it would investigate the case of a British Muslim family that was not allowed to board a US-bound plane for a trip to Disneyland that they had planned for months. Two British brothers were accompanying their nine children to the amusement park in the United States, but were told by a US official at London’s Gatwick airport that their permission to fly had been revoked.

While the family had been granted the travel authorisation weeks ago, they were not given any reason for the abrupt reversal on December 15, Reuters reported. They were also told that the 9,000 pounds they had spent on flight tickets would not be refunded to them. Their local MP, Stella Creasy, wrote to Cameron’s office asking for help in the case. “It is not just the family themselves who are livid. The vacuum created by a refusal to provide any context for these decisions is fuelling resentment and debate,” she said.

A spokesperson for Cameron said: "We are looking into the issue and the Prime Minister will respond in due course.” The US border protection agency issued a statement saying religion, faith, or spiritual beliefs did not determine a travellers eligibility to enter the US, and that it was for the tourists to provide adequate proof that they have followed all the rules of admissibility. The statement, however, refused to provide any answers to why they had been stopped.

Anti-Muslim sentiments in the US have been stoked by popular presidential candidate Donald Trump, who recently said that all people from the faith should be banned from entering the country.