The United States has raised its concerns with Gulf allies over a possible security risk in using Huawei's technology for their 5G mobile infrastructure, U.S. officials said on Thursday.

Washington has been warning allies against using the Chinese company's equipment, which it says presents a security risk, but has so far largely made public comments to European states.

Huawei has repeatedly denied the U.S. allegations, which were raised last week during a visit by Federal Communications Commission Chairman Ajit Pai to Saudi Arabia, the United Arab Emirates, and Bahrain, all of which are using its equipment.