Cabin rules for flights under US jurisdiction are typically set by the US Federal Aviation Administration. When questioned about the potential new restriction a spokesman for the agency said that he wasn’t aware of an FAA edict along those lines. After looking into the issue, however, the spokesman referred all questions to the US Department of Homeland Security.

In a exceptionally rapid response, a DHS spokesman returned Quartz’s emailed request for comment in 57 seconds, saying “We have no comment on potential security precautions.”

The Associated Press reports that John Kelly, the Homeland Security secretary, contacted policy makers in recent days to inform them about aviation security issues that spurred the device ban.

Qatar, Etihad, and Emirates did not immediately respond to inquiries about any restrictions to electronics in their cabins on certain or all flights. United and Delta each said they had nothing to share at this time, while American Airlines said “We don’t anticipate any changes for flights operated by American Airlines.”

The Royal Jordanian tweet specifically mentions laptops, cameras, DVD players, and gaming devices as banned at the request of “the concerned US departments.” The edict was distributed by the US Transportation Safety Administration on Monday, with immediate effect, the Guardian reported. The TSA referred all questions to the DHS.

If it is enforced, the restriction would be in direct conflict with the rules for baggage carried in the hold, because lithium batteries are not allowed to be checked due to their risk of catching fire. Passengers are required to carry them in the cabin to make sure that if they do catch fire or begin to overheat, they can be extinguished.

With assistance from Abdi Latif in Nairobi and Heather Timmons in Washington, D.C.

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